CVE-2026-55192

HIGHPre-NVD 7.27.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 58% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — Patch released this weekElevated
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.2Exploit: Elevated riskExposed: 0

A fix is available — apply it.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP H.264 decoder backends can return YUV planes sized from the bitstream without comparing the decoded width and height to the RDPGFX surface dimensions used to validate region rectangles. A malicious RDP server can provide an AVC420 or AVC444 bitstream whose decoded frame is smaller than the negotiated surface, causing yuv420_context_decode and the YUV-to-RGB conversion paths to read beyond the decoder-owned planes in libfreerdp/codec/h264.c and the selected H.264 backend. This can disclose client memory or crash the client. This issue is fixed in version 3.27.0.

CVSS v3
7.2
EG Score
7.2(medium)
EG Risk
63(Attend)
EG Risk 63/100SSVC: 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
Severity72% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
42%
KEV
Not listed

Published

August 19, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Aug 19, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available🟡 PoC Available

Out-of-bounds read in H.264 YUV-to-RGB conversion due to decoder/surface dimension mismatch · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3mmf-qh4f-frm6
github_release Patch Available

3.27.0

Patch available: FreeRDP/FreeRDP 3.27.0

https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0
github_pr

Bounds fixes

Fix merged in FreeRDP/FreeRDP PR #12873 on 2026-06-11 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/pull/12873
github_commit

commit 0cd45b70bb1f (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit 0cd45b70bb1f — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/0cd45b70bb1fe6befd258ff64c46461947e99adb

Vendor Advisories for CVE-2026-55192(1)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuwinpr3-utils (3.30.0+dfsg-0ubuntu0.26.04.1) @ resolute2026-09-18ubuntu
redhatfreerdp-2:3.10.3-3.el10_0.162026-09-17redhat
redhatfreerdp-0:2.1.1-5.el7_9.122026-09-17redhat

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

(3 across 3 ecosystems)
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 ... 3.31.0+dfsg-1 (44 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
freerdp33.15.0+dfsg-2.1 ... 3.26.0+dfsg-1~bpo13+1 (33 versions)3.27.0+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 26× in last 7d / 105× 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 109 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-55192?
CVE-2026-55192 is a high vulnerability published on August 19, 2026. FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP H.264 decoder backends can return YUV planes sized from the bitstream without comparing the decoded width and height to the RDPGFX surface dimensions used to validate region rectangles. A malicious RDP server…
When was CVE-2026-55192 disclosed?
CVE-2026-55192 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55192 actively exploited?
CVE-2026-55192 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 58.3% of all scored CVEs.
What is the CVSS score of CVE-2026-55192?
CVE-2026-55192 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-55192?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55192, 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

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