CVE-2026-85089

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-03. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: Elevated riskExposed: 0

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

FreeRDP versions 3.0.0 through 3.30.0 (before 3.31.0) transmit uninitialized heap memory in Save Session Info PDU reserved padding fields. Three PDU writers in libfreerdp/core/info.c (rdp_write_logon_info_v2, rdp_write_logon_info_plain, and rdp_write_logon_info_ex) use Stream_Seek instead of Stream_Zero for reserved pad bytes (up to 576 bytes), leaving previously freed heap contents in the outgoing PDU. Because the send buffer is allocated with malloc (not zeroed), stale heap data — which may include cleartext credentials from prior sessions — can be sent to the receiving peer. FreeRDP-based servers using rdpUpdate::SaveSessionInfo and freerdp-proxy (which forwards these PDUs) are affected, allowing disclosure of server/proxy process memory to a downstream client.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

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
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

September 3, 2026

Last Modified

September 9, 2026

Advisory Details (7)

Auto-updated Sep 3, 2026
Patch available. Sources: github, github_commit, github_release.
generic

FreeRDP before 3.31.0 Information Disclosure via uninitialized heap memory | Advisories | VulnCheck

https://www.vulncheck.com/advisories/freerdp-before-3.31.0-information-disclosure-via-uninitialized-heap-memory
generic

GitHub - FreeRDP/FreeRDP: FreeRDP is a free remote desktop protocol library and clients · GitHub

https://github.com/FreeRDP/FreeRDP
generic

FreeRDP/libfreerdp/core/info.c at 3.30.0 · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/blob/3.30.0/libfreerdp/core/info.c#L1541
github_release Patch Available

3.31.0

Patch available: FreeRDP/FreeRDP 3.31.0

https://github.com/FreeRDP/FreeRDP/releases/tag/3.31.0
github_commit

commit 483c9388119f (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit 483c9388119f — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/483c9388119f06bac420d92053cff9ef94e83bea
github_commit

commit 056cede398d7 (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit 056cede398d7 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/056cede398d71c1f2540baebc26ec3327a249301
github Patch Available

Uninitialised heap disclosure in FreeRDP Save Session Info PDU · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v649-94v2-p72q

Vendor Advisories for CVE-2026-85089(1)

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

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 ... 3.31.1+dfsg-1 (45 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
freerdp33.15.0+dfsg-2.1 ... 3.30.0+dfsg-1~bpo13+1 (40 versions)3.31.0+dfsg-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 50× 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. 2026-09-19 04:24 UTCEG score recompute
  2. 2026-09-19 04:24 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 05:58 UTCEG score recompute
  5. 2026-09-18 05:58 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-17 07:31 UTCEG score recompute
  8. 2026-09-17 07:31 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-16 09:03 UTCEG score recompute
  11. 2026-09-16 09:03 UTCGHSA enrichment
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 10:14 UTCEG score recompute
  14. 2026-09-15 10:14 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 11:47 UTCEG score recompute
  18. 2026-09-14 11:47 UTCGHSA enrichment
  19. 2026-09-13 13:20 UTCEG score recompute
  20. 2026-09-13 13:20 UTCGHSA enrichment
  21. 2026-09-12 14:53 UTCGHSA enrichment
  22. 2026-09-11 16:27 UTCEG score recompute
  23. 2026-09-11 16:27 UTCGHSA enrichment
  24. 2026-09-11 14:53 UTCEPSS rescore
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 25 more
  1. 2026-09-10 18:00 UTCEG score recompute
  2. 2026-09-10 18:00 UTCGHSA enrichment
  3. 2026-09-09 19:33 UTCGHSA enrichment
  4. 2026-09-09 18:47 UTCEG score recompute
  5. 2026-09-09 18:47 UTCGHSA enrichment
  6. 2026-09-08 22:01 UTCEPSS rescore
  7. 2026-09-08 20:20 UTCGHSA enrichment
  8. 2026-09-08 06:53 UTCEG score recompute
  9. 2026-09-08 06:53 UTCGHSA enrichment
  10. 2026-09-07 08:21 UTCEG score recompute
  11. 2026-09-07 08:21 UTCGHSA enrichment
  12. 2026-09-06 13:48 UTCEPSS rescore
  13. 2026-09-06 09:52 UTCEG score recompute
  14. 2026-09-06 09:52 UTCGHSA enrichment
  15. 2026-09-05 15:31 UTCEPSS rescore
  16. 2026-09-05 11:26 UTCEG score recompute
  17. 2026-09-05 11:26 UTCGHSA enrichment
  18. 2026-09-04 12:58 UTCEG score recompute
  19. 2026-09-04 12:58 UTCGHSA enrichment
  20. 2026-09-04 05:07 UTCEPSS rescore
  21. 2026-09-03 14:30 UTCEG score recompute
  22. 2026-09-03 14:07 UTCEG score recompute
  23. 2026-09-03 13:15 UTCEG score recompute
  24. 2026-09-03 01:09 UTCEG score recompute
  25. 2026-09-03 01:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-85089?
CVE-2026-85089 is a medium vulnerability published on September 3, 2026. FreeRDP versions 3.0.0 through 3.30.0 (before 3.31.0) transmit uninitialized heap memory in Save Session Info PDU reserved padding fields. Three PDU writers in libfreerdp/core/info.c (rdpwritelogoninfov2, rdpwritelogoninfoplain, and rdpwritelogoninfoex) use StreamSeek instead of StreamZero for…
When was CVE-2026-85089 disclosed?
CVE-2026-85089 was first published in the National Vulnerability Database on September 3, 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-2026-85089 actively exploited?
CVE-2026-85089 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 64.4% of all scored CVEs.
What is the CVSS score of CVE-2026-85089?
CVE-2026-85089 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-85089?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85089, 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-2026-85089

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