CVE-2026-67291

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

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, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains a heap out-of-bounds read in update_process_glyph_fragments()/glyph_cache_fragment_put() in libfreerdp/cache/glyph.c. When handling a GLYPH_FRAGMENT_ADD update, the code reads a one-byte server-controlled declared fragment size but does not verify it fits within the remaining received buffer before allocating and copying that many bytes. A malicious RDP server can send a short fragment with an oversized declared size, causing the client to read beyond the allocated buffer, resulting in an out-of-bounds read and client crash.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

August 1, 2026

Last Modified

August 3, 2026

Advisory Details (3)

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

FreeRDP before 3.29.0 Heap Out-of-Bounds Read via GLYPH_FRAGMENT_ADD | Advisories | VulnCheck

https://www.vulncheck.com/advisories/freerdp-before-heap-out-of-bounds-read-via-glyph-fragment-add
github_commit

commit f3b434710511 (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit f3b434710511 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/f3b4347105114fe7453828736bea069999af319f
github Patch Available

FreeRDP GLYPH_FRAGMENT_ADD declared size causes client heap out-of-bounds read · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hgj8-g595-wfc6

Vendor Advisories for CVE-2026-67291(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 rangeFixed inDependents
freerdp22.10.0+dfsg1-1 ... 2.9.0+dfsg1-1~bpo11+1 (32 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
freerdp22.10.0+dfsg1-1 ... 2.11.7+dfsg1-6~deb12u1 (13 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
freerdp33.15.0+dfsg-2.1 ... 3.30.0+dfsg-1~bpo13+1 (43 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
freerdp33.15.0+dfsg-2.1 ... 3.28.0+dfsg-2 (37 versions)3.29.0+dfsg-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 78× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-08-21 04:21 UTCEG score recompute
  2. 2026-08-21 04:21 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 15:39 UTCGHSA enrichment
  5. 2026-08-20 02:57 UTCEG score recompute
  6. 2026-08-20 02:57 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 14:14 UTCGHSA enrichment
  9. 2026-08-19 01:32 UTCEG score recompute
  10. 2026-08-19 01:32 UTCGHSA enrichment
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-18 12:51 UTCGHSA enrichment
  13. 2026-08-17 23:35 UTCEG score recompute
  14. 2026-08-17 23:35 UTCGHSA enrichment
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-17 10:53 UTCGHSA enrichment
  17. 2026-08-16 22:12 UTCEG score recompute
  18. 2026-08-16 22:12 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 09:30 UTCEG score recompute
  21. 2026-08-16 09:30 UTCGHSA enrichment
  22. 2026-08-15 20:49 UTCGHSA enrichment
  23. 2026-08-15 08:07 UTCEG score recompute
  24. 2026-08-15 08:07 UTCGHSA enrichment
  25. 2026-08-15 01:30 UTCEPSS rescore
Show 53 more
  1. 2026-08-14 19:25 UTCGHSA enrichment
  2. 2026-08-14 06:44 UTCEG score recompute
  3. 2026-08-14 06:44 UTCGHSA enrichment
  4. 2026-08-13 22:00 UTCEPSS rescore
  5. 2026-08-13 18:02 UTCGHSA enrichment
  6. 2026-08-13 05:20 UTCGHSA enrichment
  7. 2026-08-12 16:36 UTCEG score recompute
  8. 2026-08-12 16:36 UTCGHSA enrichment
  9. 2026-08-12 13:51 UTCEPSS rescore
  10. 2026-08-12 03:52 UTCGHSA enrichment
  11. 2026-08-11 15:10 UTCEG score recompute
  12. 2026-08-11 15:10 UTCGHSA enrichment
  13. 2026-08-11 02:23 UTCEG score recompute
  14. 2026-08-11 02:23 UTCGHSA enrichment
  15. 2026-08-11 00:00 UTCEPSS rescore
  16. 2026-08-10 13:42 UTCGHSA enrichment
  17. 2026-08-10 01:00 UTCEG score recompute
  18. 2026-08-10 01:00 UTCGHSA enrichment
  19. 2026-08-09 13:47 UTCEPSS rescore
  20. 2026-08-09 12:19 UTCGHSA enrichment
  21. 2026-08-08 23:37 UTCEG score recompute
  22. 2026-08-08 23:37 UTCGHSA enrichment
  23. 2026-08-08 16:37 UTCEPSS rescore
  24. 2026-08-08 10:55 UTCGHSA enrichment
  25. 2026-08-07 22:13 UTCEG score recompute
  26. 2026-08-07 22:13 UTCGHSA enrichment
  27. 2026-08-07 09:31 UTCGHSA enrichment
  28. 2026-08-06 20:49 UTCEG score recompute
  29. 2026-08-06 20:49 UTCGHSA enrichment
  30. 2026-08-06 13:47 UTCEPSS rescore
  31. 2026-08-06 08:07 UTCGHSA enrichment
  32. 2026-08-05 19:25 UTCEG score recompute
  33. 2026-08-05 19:25 UTCGHSA enrichment
  34. 2026-08-05 19:17 UTCEPSS rescore
  35. 2026-08-05 19:17 UTCEPSS rescore
  36. 2026-08-05 06:43 UTCGHSA enrichment
  37. 2026-08-04 18:02 UTCEG score recompute
  38. 2026-08-04 18:01 UTCGHSA enrichment
  39. 2026-08-04 15:10 UTCEPSS rescore
  40. 2026-08-04 10:39 UTCEPSS rescore
  41. 2026-08-04 05:18 UTCGHSA enrichment
  42. 2026-08-03 16:36 UTCEG score recompute
  43. 2026-08-03 16:36 UTCGHSA enrichment
  44. 2026-08-03 15:28 UTCEG score recompute
  45. 2026-08-03 15:28 UTCGHSA enrichment
  46. 2026-08-03 10:36 UTCEPSS rescore
  47. 2026-08-03 03:25 UTCGHSA enrichment
  48. 2026-08-02 14:42 UTCGHSA enrichment
  49. 2026-08-02 02:00 UTCEG score recompute
  50. 2026-08-02 02:00 UTCGHSA enrichment
  51. 2026-08-01 13:18 UTCEG score recompute
  52. 2026-08-01 12:43 UTCEG score recompute
  53. 2026-08-01 12:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67291?
CVE-2026-67291 is a high vulnerability published on August 1, 2026. FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains a heap out-of-bounds read in updateprocessglyphfragments()/glyphcachefragmentput() in libfreerdp/cache/glyph.c. When handling a GLYPHFRAGMENTADD update, the code reads a one-byte server-controlled declared fragment size but does not…
When was CVE-2026-67291 disclosed?
CVE-2026-67291 was first published in the National Vulnerability Database on August 1, 2026, with the most recent update on August 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67291 actively exploited?
CVE-2026-67291 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 73.0% of all scored CVEs.
What is the CVSS score of CVE-2026-67291?
CVE-2026-67291 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-67291?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67291, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-67291

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