CVE-2026-67300

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 — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%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 49/100CISA 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%
Exploitation1% × 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
0.6%
EPSS %ILE
46th
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 none (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

August 31, 2026

Advisory Details (3)

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

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 Patch Available

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 18× in last 7d / 83× 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 212 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-67300?
CVE-2026-67300 is a high vulnerability 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 WINDOWSTATEORDER and NOTIFYICONSTATE_ORDER when AsyncUpdate is enabled. When a malicious or compromised RDP server sends crafted update orders, the message proxy shallow-copies…
When was CVE-2026-67300 disclosed?
CVE-2026-67300 was first published on August 1, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67300 actively exploited?
CVE-2026-67300 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (46th 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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