CVE-2021-42574

HIGHNVD 8.38.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This high-severity CVE scores 8.3 under NVD CVSS v3. EPSS exploit probability: 13% (96th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 3 sources updated this weekElevated

Also known asEUVD-2021-29541 (ENISA EUVD)Source: ENISA EUVD

8.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedEPSS PROB: 13%CVSS: 8.3Exploit: Public PoCExposed services: Not assessed

A fix is available — apply it.

An issue was discovered in the Bidirectional Algorithm in the Unicode Specification through 14.0. It permits the visual reordering of characters via control sequences, which can be used to craft source code that renders different logic than the logical ordering of tokens ingested by compilers and interpreters. Adversaries can leverage this to encode source code for compilers accepting Unicode such that targeted vulnerabilities are introduced invisibly to human reviewers. NOTE: the Unicode Consortium offers the following alternative approach to presenting this concern. An issue is noted in the nature of international text that can affect applications that implement support for The Unicode Standard and the Unicode Bidirectional Algorithm (all versions). Due to text display behavior when text includes left-to-right and right-to-left characters, the visual order of tokens may be different from their logical order. Additionally, control characters needed to fully support the requirements of bidirectional text can further obfuscate the logical order of tokens. Unless mitigated, an adversary could craft source code such that the ordering of tokens perceived by human reviewers does not match what will be processed by a compiler/interpreter/etc. The Unicode Consortium has documented this class of vulnerability in its document, Unicode Technical Report #36, Unicode Security Considerations. The Unicode Consortium also provides guidance on mitigations for this class of issues in Unicode Technical Standard #39, Unicode Security Mechanisms, and in Unicode Standard Annex #31, Unicode Identifier and Pattern Syntax. Also, the BIDI specification allows applications to tailor the implementation in ways that can mitigate misleading visual reordering in program text; see HL4 in Unicode Standard Annex #9, Unicode Bidirectional Algorithm.

CVSS v3
8.3
EG Score
8.3HIGHmedium confidence
EG Risk
53
EG Risk 53/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity83% × 45%
Impact severity (EG Severity): CVSS 8.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
13%
EPSS %ILE
96th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.3): severity, escalated by confirmed exploitation. This CVE's 8.3 is its impact severity (EG Severity), not escalated.

EG Severity
8.3 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
13% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

November 1, 2021

Last Modified

November 21, 2024

Advisory Details (10)

Auto-updated Sep 5, 2026
Patch available.
Web page

Rust: Multiple Vulnerabilities (GLSA 202210-09) — Gentoo security

https://security.gentoo.org/glsa/202210-09
Web page

[SECURITY] Fedora 34 Update: rust-1.56.1-1.fc34 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QUPA37D57VPTDLSXOOGF4UXUEADOC4PQ/
Web page

[SECURITY] Fedora 35 Update: rust-1.56.1-1.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LQNTFF24ROHLVPLUOEISBN3F7QM27L4U/
Web page

[SECURITY] Fedora 33 Update: rust-1.56.1-1.fc33 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IH2RG5YTR6ZZOLUV3EUPZEIJR7XHJLVD/
Web page

Unicode 14.0.0

http://www.unicode.org/versions/Unicode14.0.0/
Web page

oss-security - Re: Trojan Source Attacks

http://www.openwall.com/lists/oss-security/2021/11/02/10
Web page

oss-security - Trojan Source Attacks

http://www.openwall.com/lists/oss-security/2021/11/01/6
Web page

oss-security - Re: CVE-2021-42574: rustc 1.56.0 and bidirectional-override codepoints in source code

http://www.openwall.com/lists/oss-security/2021/11/01/5
Web page

oss-security - Re: CVE-2021-42574: rustc 1.56.0 and bidirectional-override codepoints in source code

http://www.openwall.com/lists/oss-security/2021/11/01/4
Web page

oss-security - CVE-2021-42574: rustc 1.56.0 and bidirectional-override codepoints in source code

http://www.openwall.com/lists/oss-security/2021/11/01/1

Vendor Advisories for CVE-2021-42574(14)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatllvm-toolset:rhel8-8050020211110163227.c53685002021-11-18redhat
redhatdevtoolset-11-binutils-0:2.36.1-1.el7.12021-11-18redhat
redhatdevtoolset-11-annobin-0:9.82-1.el7.12021-11-18redhat
redhatdevtoolset-10-binutils-0:2.35-5.el7.32021-11-17redhat
redhatdevtoolset-10-annobin-0:9.23-4.el7.12021-11-17redhat
redhatrust-toolset-1.54-rust-0:1.54.0-4.el7_92021-11-16redhat
redhatgcc-toolset-10-binutils-0:2.35-8.el8_5.62021-11-15redhat
redhatdevtoolset-11-gcc-0:11.2.1-1.2.el72021-11-15redhat
redhatbinutils-0:2.30-93.el8_4.22021-11-10redhat
redhatgcc-toolset-10-gcc-0:10.3.1-1.2.el8_52021-11-10redhat
redhatbinutils-0:2.30-108.el8_5.12021-11-10redhat
redhatgcc-toolset-10-annobin-0:9.29-1.el8_4.12021-11-10redhat
redhatbinutils-0:2.30-73.el8_2.12021-11-10redhat
redhatgcc-toolset-11-gcc-0:11.2.1-1.2.el8_52021-11-10redhat
redhatgcc-toolset-10-annobin-0:9.29-1.el8_5.22021-11-10redhat
redhatannobin-0:9.72-1.el8_5.22021-11-10redhat
redhatrust-toolset:rhel8-8050020211027231136.5c15747c2021-11-10redhat
redhatbinutils-0:2.30-58.el8_1.32021-11-10redhat
redhatannobin-0:8.90-1.el8_2.12021-11-10redhat
redhatgcc-toolset-10-binutils-0:2.35-8.el8_4.52021-11-10redhat
redhatgcc-toolset-11-annobin-0:9.85-1.el8_5.12021-11-10redhat
redhatannobin-0:9.50-1.el8_4.12021-11-10redhat
redhatgcc-toolset-11-binutils-0:2.36.1-1.el8_5.12021-11-10redhat
redhatgcc-0:8.5.0-4.el8_52021-11-10redhat
redhatannobin-0:8.78-1.el8_1.12021-11-10redhat
redhatbinutils-0:2.27-34.base.el7_6.42021-11-01redhat
redhatbinutils-0:2.23.52.0.1-55.el7_2.42021-11-01redhat
redhatbinutils-0:2.25.1-22.base.el7_3.32021-11-01redhat
redhatbinutils-0:2.27-44.base.el7_9.12021-11-01redhat
redhatbinutils-0:2.25.1-32.base.el7_4.52021-11-01redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(10 across 10 ecosystems)
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
rust—
  • every version up to 1.56.1-r0: fixed in 1.56.1-r0
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
rust—
  • every version up to 1.56.1-r0: fixed in 1.56.1-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
rust—
  • every version up to 1.56.1-r0: fixed in 1.56.1-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
rust—
  • every version up to 1.56.1-r0: fixed in 1.56.1-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
rust—
  • every version up to 1.56.1-r0: fixed in 1.56.1-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
rust—
  • every version up to 1.56.1-r0: fixed in 1.56.1-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
rustc1.48.0+dfsg1-2 ... 1.96.0+dfsg1-1~exp1 (200 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
rustc—
  • every version up to 1.57.0+dfsg1-1: fixed in 1.57.0+dfsg1-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
rustc—
  • every version up to 1.57.0+dfsg1-1: fixed in 1.57.0+dfsg1-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
rustc—
  • every version up to 1.57.0+dfsg1-1: fixed in 1.57.0+dfsg1-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(17)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 9× in last 7d / 37× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 96 of 203 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 100 are merged into the row they repeat. The 107 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:37 UTCEPSS rescoreEPSS 13% · 96th percentile
  2. 2026-11-01 16:29 UTCEPSS rescoreEPSS 13% · 96th percentile
  3. 2026-10-31 16:29 UTCEPSS rescoreEPSS 13% · 96th percentile
  4. 2026-10-30 16:30 UTCEPSS rescoreEPSS 13% · 96th percentile
  5. 2026-10-29 16:29 UTCEPSS rescoreEPSS 13% · 96th percentile
  6. 2026-10-28 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
  7. 2026-10-28 05:11 UTCEG score recompute
  8. 2026-10-28 05:11 UTCVendor advisory
  9. 2026-10-27 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
  10. 2026-10-26 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
  11. 2026-10-25 18:21 UTCEG score recompute
  12. 2026-10-25 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
  13. 2026-10-24 16:29 UTCEPSS rescoreEPSS 13% · 96th percentile
  14. 2026-10-23 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
  15. 2026-10-22 16:29 UTCEPSS rescoreEPSS 13% · 96th percentile
  16. 2026-10-21 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
  17. 2026-10-21 08:54 UTCEG score recompute
  18. 2026-10-21 08:54 UTCVendor advisory
  19. 2026-10-20 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
  20. 2026-10-19 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
  21. 2026-10-18 08:53 UTCEG score recompute
  22. 2026-10-17 16:55 UTCOSV refresh
  23. 2026-10-17 16:29 UTCEPSS rescoreEPSS 13% · 96th percentile
  24. 2026-10-16 16:34 UTCEPSS rescoreEPSS 13% · 96th percentile
  25. 2026-10-15 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
Show 71 more
  1. 2026-10-14 16:29 UTCEPSS rescoreEPSS 13% · 96th percentile
  2. 2026-10-13 16:28 UTCEPSS rescoreEPSS 13% · 96th percentile
  3. 2026-10-12 19:09 UTCEG score recompute
  4. 2026-10-12 16:30 UTCEPSS rescoreEPSS 13% · 96th percentile
  5. 2026-10-11 23:34 UTCEG score recompute
  6. 2026-10-11 13:44 UTCEPSS rescoreEPSS 13% · 96th percentile
  7. 2026-10-10 19:56 UTCEPSS rescoreEPSS 13% · 96th percentile
  8. 2026-10-09 20:04 UTCEPSS rescoreEPSS 13% · 96th percentile
  9. 2026-10-08 16:40 UTCEPSS rescoreEPSS 13% · 96th percentile
  10. 2026-10-07 23:45 UTCEPSS rescoreEPSS 13% · 96th percentile
  11. 2026-10-06 15:14 UTCEPSS rescoreEPSS 13% · 96th percentile
  12. 2026-10-05 17:40 UTCEPSS rescoreEPSS 13% · 96th percentile
  13. 2026-10-03 14:22 UTCEPSS rescoreEPSS 13% · 96th percentile
  14. 2026-10-02 16:23 UTCEPSS rescoreEPSS 13% · 96th percentile
  15. 2026-10-01 19:46 UTCEPSS rescoreEPSS 13% · 96th percentile
  16. 2026-09-30 15:42 UTCEG score recompute
  17. 2026-09-30 15:00 UTCEPSS rescoreEPSS 13% · 96th percentile
  18. 2026-09-29 15:15 UTCEPSS rescoreEPSS 13% · 96th percentile
  19. 2026-09-28 13:47 UTCEPSS rescoreEPSS 13% · 96th percentile
  20. 2026-09-27 13:41 UTCEPSS rescoreEPSS 13% · 96th percentile
  21. 2026-09-26 15:54 UTCEPSS rescoreEPSS 13% · 96th percentile
  22. 2026-09-26 00:21 UTCEPSS rescoreEPSS 13% · 96th percentile
  23. 2026-09-25 13:15 UTCOSV refresh
  24. 2026-09-24 14:00 UTCEPSS rescoreEPSS 13% · 96th percentile
  25. 2026-09-23 13:44 UTCEPSS rescoreEPSS 13% · 96th percentile
  26. 2026-09-22 14:44 UTCEPSS rescoreEPSS 13% · 96th percentile
  27. 2026-09-21 20:28 UTCEPSS rescoreEPSS 13% · 96th percentile
  28. 2026-09-20 20:13 UTCEPSS rescoreEPSS 13% · 96th percentile
  29. 2026-09-19 15:38 UTCEPSS rescoreEPSS 13% · 96th percentile
  30. 2026-09-18 19:23 UTCEPSS rescoreEPSS 13% · 96th percentile
  31. 2026-09-17 19:23 UTCEPSS rescoreEPSS 13% · 96th percentile
  32. 2026-09-16 14:05 UTCEPSS rescoreEPSS 13% · 96th percentile
  33. 2026-09-15 03:06 UTCEPSS rescoreEPSS 13% · 96th percentile
  34. 2026-09-12 14:57 UTCEPSS rescoreEPSS 13% · 96th percentile
  35. 2026-09-11 14:49 UTCEPSS rescoreEPSS 13% · 96th percentile
  36. 2026-09-11 09:33 UTCEPSS rescoreEPSS 13% · 96th percentile
  37. 2026-09-08 21:56 UTCEPSS rescoreEPSS 13% · 96th percentile
  38. 2026-09-07 15:58 UTCEPSS rescoreEPSS 13% · 96th percentile
  39. 2026-09-06 13:45 UTCEPSS rescoreEPSS 13% · 96th percentile
  40. 2026-09-06 04:22 UTCOSV refresh
  41. 2026-09-05 15:25 UTCEPSS rescoreEPSS 13% · 96th percentile
  42. 2026-09-04 13:57 UTCEPSS rescoreEPSS 13% · 96th percentile
  43. 2026-09-04 05:03 UTCEPSS rescoreEPSS 13% · 96th percentile
  44. 2026-09-02 14:09 UTCEPSS rescoreEPSS 13% · 96th percentile
  45. 2026-09-01 13:50 UTCEPSS rescoreEPSS 13% · 96th percentile
  46. 2026-09-01 03:33 UTCEPSS rescoreEPSS 13% · 96th percentile
  47. 2026-08-30 19:14 UTCEPSS rescoreEPSS 13% · 96th percentile
  48. 2026-08-30 01:19 UTCEPSS rescoreEPSS 13% · 96th percentile
  49. 2026-08-28 21:37 UTCEPSS rescoreEPSS 13% · 96th percentile
  50. 2026-08-27 14:22 UTCEPSS rescoreEPSS 13% · 96th percentile
  51. 2026-08-26 14:43 UTCEPSS rescoreEPSS 13% · 96th percentile
  52. 2026-08-25 13:46 UTCEPSS rescoreEPSS 13% · 95th percentile
  53. 2026-08-24 14:13 UTCEPSS rescoreEPSS 12% · 95th percentile
  54. 2026-08-23 00:16 UTCEPSS rescoreEPSS 12% · 95th percentile
  55. 2026-08-21 23:46 UTCEPSS rescoreEPSS 12% · 95th percentile
  56. 2026-08-20 22:52 UTCEPSS rescoreEPSS 12% · 95th percentile
  57. 2026-08-19 17:01 UTCEPSS rescoreEPSS 12% · 95th percentile
  58. 2026-08-19 15:29 UTCOSV refresh
  59. 2026-08-18 13:45 UTCEPSS rescoreEPSS 12% · 95th percentile
  60. 2026-08-16 14:53 UTCEPSS rescoreEPSS 12% · 95th percentile
  61. 2026-08-16 02:11 UTCEPSS rescoreEPSS 12% · 95th percentile
  62. 2026-08-15 01:27 UTCEPSS rescoreEPSS 12% · 95th percentile
  63. 2026-08-13 21:57 UTCEPSS rescoreEPSS 12% · 95th percentile
  64. 2026-08-12 13:48 UTCEPSS rescoreEPSS 12% · 95th percentile
  65. 2026-08-11 13:38 UTCEPSS rescoreEPSS 12% · 95th percentile
  66. 2026-08-09 13:44 UTCEPSS rescoreEPSS 12% · 95th percentile
  67. 2026-08-08 16:33 UTCEPSS rescoreEPSS 12% · 95th percentile
  68. 2026-08-07 16:24 UTCEPSS rescoreEPSS 12% · 95th percentile
  69. 2026-08-06 13:44 UTCEPSS rescoreEPSS 12% · 95th percentile
  70. 2026-08-05 19:14 UTCEPSS rescoreEPSS 12% · 95th percentile
  71. 2026-08-04 11:27 UTCOSV refresh

Publicly available exploits

(5 references)

Public exploit code is referenced for this CVE (2 GitHub PoCs), as are 3 GitHub checker repositories. A GitHub repository named or described as a checker or scanner checks whether a system is affected; it is not necessarily exploit code. Defenders should treat patch urgency accordingly.

  • GitHub checkerrakib-nyc/nullorigin
    Published Aug 16, 2026

    Research-only AI watermark & provenance robustness toolkit: local reverse proxy (OpenAI/Anthropic/Gemini) + CLI stripping C2PA/EXIF/XMP, zero-width & homoglyph Unicode, KGW text watermarks, DWT/Tree-Ring image stego, AudioSeal, PDF/DOCX/PPTX/XLSX metadata, and Trojan Source (CVE-2021-42574) code scanning.

    Open source ↗
  • GitHub checkerMoshe-ship/bidi-guard
    Published Mar 21, 2026

    Scan code for invisible bidirectional Unicode characters (Trojan Source attack prevention, CVE-2021-42574)

    Open source ↗
  • GitHub PoCtin-z/solidity_CVE-2021-42574-POC
    Published Jan 31, 2023

    POC of CVE-2021-42574 for solidity and solc compiler

    Open source ↗
  • GitHub checkermaweil/bidi_char_detector
    Published Nov 6, 2021

    Checks your files for existence of Unicode BIDI characters which can be misused for supply chain attacks. See CVE-2021-42574

    Open source ↗
  • GitHub PoCsimplylu/CVE-2021-42574
    Published Nov 2, 2021

    Generate malicious files using recently published bidi-attack (CVE-2021-42574)

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2021-42574?
CVE-2021-42574 is a high-severity vulnerability; its CVE record was published on November 1, 2021. An issue was discovered in the Bidirectional Algorithm in the Unicode Specification through 14.0. It permits the visual reordering of characters via control sequences, which can be used to craft source code that renders different logic than the logical ordering of tokens ingested by compilers and…
When was the CVE record for CVE-2021-42574 published?
The CVE record for CVE-2021-42574 was published on November 1, 2021. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2021-42574 actively exploited?
CVE-2021-42574 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13% probability of exploitation in the next 30 days (96th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-42574?
CVE-2021-42574 has a CVSS v3 base score of 8.3 (NVD).
How do I remediate CVE-2021-42574?
A fix for CVE-2021-42574 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2021-42574 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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