CVE-2026-67300

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-01. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week

Also known asEUVD-2026-51821 (ENISA EUVD) · GHSA-hp6g-g26j-5q54 (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

FreeRDP before 3.29.0 contains client-side heap use-after-free vulnerabilities in the async update message proxy for RAIL WINDOW_STATE_ORDER and NOTIFY_ICON_STATE_ORDER when AsyncUpdate is enabled. When a malicious or compromised RDP server sends crafted update orders, the message proxy shallow-copies structures containing nested parser-owned pointers (e.g., titleInfo.string, windowRects, visibilityRects, icon buffers). The parser frees those nested buffers after the callback returns, so the queued async message later dispatches stale pointers, potentially causing memory corruption or a client crash.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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
0.3%
EPSS %ILE
25th
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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% 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 or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days 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 or medium mission impact; Attend at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

August 1, 2026

Last Modified

August 31, 2026

Advisory Details (3)

Auto-updated Aug 1, 2026
Patch available. Sources: github, github_commit.
Web page

FreeRDP before 3.29.0 Use-After-Free via async message proxy | Advisories | VulnCheck

https://www.vulncheck.com/advisories/freerdp-before-use-after-free-via-async-message-proxy
GitHub commit

commit 5370fb26fbf0 (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit 5370fb26fbf0 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/5370fb26fbf034ecd11d3026b6ad639b5fff493f
GitHub advisoryMentions a patch (unverified)

FreeRDP Window and NotifyIcon async message-proxy use-after-free · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-33gg-h66j-3697

Vendor Advisories for CVE-2026-67300(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp22.10.0+dfsg1-1 ... 2.9.0+dfsg1-1~bpo11+1 (32 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp22.10.0+dfsg1-1 ... 2.11.7+dfsg1-6~deb12u1 (13 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp33.15.0+dfsg-2.1 ... 3.32.1+dfsg-1~bpo13+1 (49 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp33.15.0+dfsg-2.1 ... 3.28.0+dfsg-2 (37 versions)
  • every version up to 3.29.0+dfsg-1: fixed in 3.29.0+dfsg-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 50× 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 100 of 256 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. None are among the latest 100 rows. The 156 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  4. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  6. 2026-10-27 18:36 UTCEG score recompute
  7. 2026-10-27 18:36 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  8. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  9. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  10. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  11. 2026-10-25 14:10 UTCEG score recompute
  12. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  13. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  14. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  15. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  16. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  17. 2026-10-20 09:04 UTCEG score recompute
  18. 2026-10-20 09:04 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  20. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  21. 2026-10-18 03:20 UTCEG score recompute
  22. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  23. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  24. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  25. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
Show 75 more
  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  2. 2026-10-13 10:49 UTCEG score recompute
  3. 2026-10-13 10:49 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  5. 2026-10-12 15:45 UTCEG score recompute
  6. 2026-10-11 19:30 UTCEG score recompute
  7. 2026-10-11 16:46 UTCEG score recompute
  8. 2026-10-11 14:07 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  14. 2026-10-06 23:48 UTCEG score recompute
  15. 2026-10-06 23:48 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  17. 2026-10-05 19:52 UTCEG score recompute
  18. 2026-10-05 19:52 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  20. 2026-10-04 23:48 UTCEG score recompute
  21. 2026-10-04 23:48 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  22. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  23. 2026-10-04 06:25 UTCEG score recompute
  24. 2026-10-04 06:25 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  25. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  26. 2026-10-03 02:43 UTCEG score recompute
  27. 2026-10-03 02:43 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  28. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  29. 2026-10-02 10:28 UTCEG score recompute
  30. 2026-10-02 10:28 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  31. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  32. 2026-10-01 14:44 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  33. 2026-10-01 02:42 UTCEG score recompute
  34. 2026-10-01 02:42 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  35. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  36. 2026-09-29 06:46 UTCEG score recompute
  37. 2026-09-29 06:46 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  38. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  39. 2026-09-28 06:22 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  40. 2026-09-27 18:21 UTCEG score recompute
  41. 2026-09-27 18:21 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  42. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  43. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  44. 2026-09-25 04:50 UTCEG score recompute
  45. 2026-09-25 04:50 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  46. 2026-09-24 09:36 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  47. 2026-09-23 21:35 UTCEG score recompute
  48. 2026-09-23 21:35 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  49. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  50. 2026-09-23 09:34 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  51. 2026-09-22 21:31 UTCEG score recompute
  52. 2026-09-22 21:31 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  53. 2026-09-22 06:57 UTCEG score recompute
  54. 2026-09-22 06:57 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  55. 2026-09-20 20:59 UTCEG score recompute
  56. 2026-09-20 20:59 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  57. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  58. 2026-09-20 01:41 UTCEG score recompute
  59. 2026-09-20 01:41 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  60. 2026-09-19 13:40 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  61. 2026-09-19 01:23 UTCEG score recompute
  62. 2026-09-19 01:23 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  63. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  64. 2026-09-18 13:20 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  65. 2026-09-18 01:14 UTCEG score recompute
  66. 2026-09-18 01:14 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  67. 2026-09-17 01:21 UTCEG score recompute
  68. 2026-09-17 01:21 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  69. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  70. 2026-09-16 05:23 UTCEG score recompute
  71. 2026-09-16 05:23 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  72. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  73. 2026-09-15 02:53 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  74. 2026-09-14 08:30 UTCGHSA enrichmentGHSA-hp6g-g26j-5q54 · GitHub severity HIGH · GitHub CVSS 7.5
  75. 2026-09-13 20:29 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-67300?
CVE-2026-67300 is a high-severity vulnerability; its CVE record was published on August 1, 2026. FreeRDP before 3.29.0 contains client-side heap use-after-free vulnerabilities in the async update message proxy for RAIL WINDOW_STATE_ORDER and NOTIFY_ICON_STATE_ORDER when AsyncUpdate is enabled. When a malicious or compromised RDP server sends crafted update orders, the message proxy…
When was CVE-2026-67300 made public?
CVE-2026-67300 was made public on July 15, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 1, 2026. EchelonGraph's copy of the record carries a last-modified date of August 31, 2026; the record at its source may have been updated since.
Is CVE-2026-67300 actively exploited?
CVE-2026-67300 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67300?
CVE-2026-67300 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-67300?
A fix for CVE-2026-67300 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67300 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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