CVE-2026-57158

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.7%, top 51% 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, nvd
Trending — 4 sources updated this weekElevated
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.1Exploit: NoneExposed: 0

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

FreeRDP is a free implementation of the Remote Desktop Protocol. From 3.21.0 before 3.28.0, FreeRDP clients using the GFX pipeline contain an incomplete fix for CVE-2026-23530 in planar_decompress_plane_rle_only in libfreerdp/codec/planar.c, allowing a malicious RDP server to send a truncated RDPGFX_CMDID_WIRETOSURFACE_1 planar payload that reads one byte past the input buffer. This issue is fixed in version 3.28.0.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
48.6%
KEV
Not listed

Published

July 10, 2026

Last Modified

July 14, 2026

Advisory Details (4)

Auto-updated Jul 10, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available🟡 PoC Available

planar_decompress_plane_rle_only: heap OOB read — incomplete fix for CVE-2026-23530 · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mp3f-59pg-c5pp
github_release Patch Available

3.28.0

Patch available: FreeRDP/FreeRDP 3.28.0

https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0
github_pr

[codec,planar] fix range check, abort early

Fix merged in FreeRDP/FreeRDP PR #12952 on 2026-06-23 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/pull/12952
github_commit

commit a7e797626fcb (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit a7e797626fcb — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/a7e797626fcb7f1d556ce63febb84f9f4a822731

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 23× 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. 2026-07-15 22:37 UTCEG score recompute
  2. 2026-07-15 18:49 UTCEG score recompute
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 15:01 UTCEG score recompute
  6. 2026-07-15 11:13 UTCEG score recompute
  7. 2026-07-15 07:25 UTCEG score recompute
  8. 2026-07-15 03:37 UTCEG score recompute
  9. 2026-07-15 02:00 UTCEPSS rescore
  10. 2026-07-15 02:00 UTCEPSS rescore
  11. 2026-07-14 23:48 UTCEG score recompute▲ 4.00
  12. 2026-07-14 15:20 UTCNVD updateCVSS v3 → 9.1 · severity → CRITICAL
  13. 2026-07-14 14:30 UTCMITRE cvelistV5CVSS v3 → 5.1 · severity → MEDIUM
  14. 2026-07-14 00:27 UTCNVD updateCVSS v3 → 9.1 · severity → CRITICAL
  15. 2026-07-13 22:52 UTCEG score recompute
  16. 2026-07-13 22:31 UTCEPSS rescore
  17. 2026-07-13 06:13 UTCEPSS rescore
  18. 2026-07-13 06:13 UTCEPSS rescore
  19. 2026-07-12 21:56 UTCEG score recompute
  20. 2026-07-12 05:46 UTCEPSS rescore
  21. 2026-07-11 21:00 UTCEG score recompute
  22. 2026-07-10 20:03 UTCEG score recompute
  23. 2026-07-10 20:02 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-57158?
CVE-2026-57158 is a critical vulnerability published on July 10, 2026. FreeRDP is a free implementation of the Remote Desktop Protocol. From 3.21.0 before 3.28.0, FreeRDP clients using the GFX pipeline contain an incomplete fix for CVE-2026-23530 in planardecompressplanerleonly in libfreerdp/codec/planar.c, allowing a malicious RDP server to send a truncated…
When was CVE-2026-57158 disclosed?
CVE-2026-57158 was first published in the National Vulnerability Database on July 10, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57158 actively exploited?
CVE-2026-57158 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 48.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-57158?
CVE-2026-57158 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-57158?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57158, 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.

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