CVE-2026-67291

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM 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 — 4 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: 0.4%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
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
0.4%
EPSS %ILE
32nd
KEV
Not listed

CISA SSVCTrack 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 public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 1, 2026

Last Modified

September 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(10)

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

Patch Availability(11)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatfreerdp-2:2.4.1-6.el9_2.122026-09-24redhat
redhatfreerdp-2:2.11.7-1.el9_6.132026-09-24redhat
redhatfreerdp-2:2.11.2-1.el9_4.112026-09-24redhat
redhatfreerdp-0:2.1.1-5.el7_9.122026-09-17redhat
redhatfreerdp-2:3.10.3-3.el10_0.162026-09-17redhat
redhatfreerdp-2:2.2.0-7.el8_6.122026-09-10redhat
redhatfreerdp-2:2.2.0-12.el8_8.112026-09-10redhat
redhatfreerdp-2:2.2.0-14.el8_4.32026-09-09redhat
redhatfreerdp-2:2.11.7-12.el8_102026-09-02redhat
redhatfreerdp-2:3.10.3-12.el10_2.102026-08-31redhat
redhatfreerdp-2:2.11.7-7.el9_8.62026-08-31redhat

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

(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.

Additional Vendor Advisories

(2)

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 25× in last 7d / 118× 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.

Showing the most recent 100 of 248 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + 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 on August 1, 2026, with the most recent update on September 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 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67291?
CVE-2026-67291 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-2026-67291?
A fix for CVE-2026-67291 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67291 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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