CVE-2026-71393

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7% (52nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 3 sources updated this week

Also known asEUVD-2026-55258 (ENISA EUVD) · GHSA-4rgf-7285-chf8 (GitHub Security Advisories)Source: ENISA EUVD

5.3EG
EchelonGraph verdictMonitorNo release containing the referenced fix is confirmed: check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

GNU Emacs for Android is vulnerable to an integer overflow in sfnt_read_name_table() in src/sfnt.c. The function computes an allocation size using a 32-bit length value from a TrueType font file without overflow checking. On 32-bit targets, a crafted font causes the calculation to wrap, resulting in an undersized heap allocation. A subsequent read() call writes beyond the buffer, causing a heap buffer overflow. An attacker can deliver a malicious font file via email, EWW (Emacs Web Wowser), or documents with custom faces, causing Emacs to load it. This can lead to heap memory corruption and potential code execution.

This issue was fixed in commit d51a4722316efe0960994d371e1859099894d1ca

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

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)
Severity53% × 45%
Impact severity (EG Severity): CVSS 5.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.7% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.7%
EPSS %ILE
52nd
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 (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.

EG Severity
5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.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 every mission impact level.

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (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 10, 2026

Last Modified

October 24, 2026

Advisory Details (2)

Auto-updated Aug 10, 2026
Fix referenced — no release confirmed yet.
Web page

Vulnerabilities in GNU Emacs software | CERT Polska

https://cert.pl/en/posts/2026/08/CVE-2026-71391

Vendor Advisories for CVE-2026-71393(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 49× 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 189 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 89 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  2. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  3. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  4. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  5. 2026-10-29 16:58 UTCEG score recompute
  6. 2026-10-29 16:58 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  7. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  8. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  11. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  12. 2026-10-25 14:07 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  14. 2026-10-24 15:29 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  15. 2026-10-23 20:30 UTCEG score recompute
  16. 2026-10-23 20:30 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  17. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  18. 2026-10-22 19:24 UTCEG score recompute
  19. 2026-10-22 19:24 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  20. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  21. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  22. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  23. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  24. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  25. 2026-10-18 03:17 UTCEG score recompute
Show 75 more
  1. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  2. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  3. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  4. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  5. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  6. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  7. 2026-10-12 15:43 UTCEG score recompute
  8. 2026-10-11 19:28 UTCEG score recompute
  9. 2026-10-11 16:43 UTCEG score recompute
  10. 2026-10-11 14:04 UTCEG score recompute
  11. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  12. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  16. 2026-10-06 19:30 UTCEG score recompute
  17. 2026-10-06 19:30 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  18. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  20. 2026-10-05 07:55 UTCEG score recompute
  21. 2026-10-05 07:55 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  22. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  23. 2026-10-04 05:36 UTCEG score recompute
  24. 2026-10-04 05:36 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  25. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  26. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  27. 2026-10-02 09:25 UTCEG score recompute
  28. 2026-10-02 09:25 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  29. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  30. 2026-09-30 22:48 UTCEG score recompute
  31. 2026-09-30 22:48 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  32. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  33. 2026-09-29 05:27 UTCEG score recompute
  34. 2026-09-29 05:27 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  35. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  36. 2026-09-27 17:00 UTCEG score recompute
  37. 2026-09-27 17:00 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  38. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  39. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  40. 2026-09-25 04:07 UTCEG score recompute
  41. 2026-09-25 04:07 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  42. 2026-09-23 21:45 UTCEG score recompute
  43. 2026-09-23 21:45 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  44. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  45. 2026-09-22 23:04 UTCEG score recompute
  46. 2026-09-22 23:04 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  47. 2026-09-22 00:22 UTCEG score recompute
  48. 2026-09-22 00:22 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  49. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  50. 2026-09-20 21:55 UTCEG score recompute
  51. 2026-09-20 21:55 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  52. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  53. 2026-09-19 23:13 UTCEG score recompute
  54. 2026-09-19 23:13 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  55. 2026-09-18 23:39 UTCEG score recompute
  56. 2026-09-18 23:39 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  57. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  58. 2026-09-18 00:53 UTCEG score recompute
  59. 2026-09-18 00:53 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  60. 2026-09-17 01:23 UTCEG score recompute
  61. 2026-09-17 01:23 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  62. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  63. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  64. 2026-09-16 02:41 UTCEG score recompute
  65. 2026-09-16 02:41 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  66. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  67. 2026-09-15 00:47 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  68. 2026-09-13 23:44 UTCEG score recompute
  69. 2026-09-13 23:44 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  70. 2026-09-13 01:02 UTCEG score recompute
  71. 2026-09-13 01:02 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  72. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  73. 2026-09-12 02:19 UTCEG score recompute
  74. 2026-09-12 02:19 UTCGHSA enrichmentGHSA-4rgf-7285-chf8
  75. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 32nd percentile

Frequently asked(5)

What is CVE-2026-71393?
CVE-2026-71393 is a medium-severity vulnerability; its CVE record was published on August 10, 2026. GNU Emacs for Android is vulnerable to an integer overflow in sfnt_read_name_table() in src/sfnt.c. The function computes an allocation size using a 32-bit length value from a TrueType font file without overflow checking. On 32-bit targets, a crafted font causes the calculation to wrap, resulting…
When was the CVE record for CVE-2026-71393 published?
The CVE record for CVE-2026-71393 was published on August 10, 2026. 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 October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-71393 actively exploited?
CVE-2026-71393 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (52nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-71393?
CVE-2026-71393 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-71393?
A fix for CVE-2026-71393 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-71393 are linked in the Vendor Advisories panel on this page.

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