Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-85089

CVE-2026-85089HIGH

FreeRDP before 3.31.0 Information Disclosure via uninitialized heap memory

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   L   N   H   N   N    7.1   .0038   29.8     —

AFFECTED
  Product  Versions  Fixed
  FreeRDP  3.0.0 –   3.31.0

TIMELINE
  Sep 2   Reserved by VulnCheck
  Sep 3   Published (CNA: VulnCheck)
  Sep 9   EXPLOIT PUBLISHED — CVE-2026-85089 (FreeRDP). Public exploit reference added.

CWE-908 · CNA: VulnCheck · CVSS v4.0 · 7 references · NVD status: Analyzed

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 2, 2026	Reserved	Reserved by VulnCheck
September 3, 2026	Published	Published (CNA: VulnCheck)
September 9, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-85089 (FreeRDP). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
FreeRDP	FreeRDP	—	3.0.0	3.31.0

Weaknesses

CWE-908

References (7)

https://github.com/FreeRDP/FreeRDP [Product]
https://github.com/FreeRDP/FreeRDP/blob/3.30.0/libfreerdp/core/info.c#L1541 [Product]
https://github.com/FreeRDP/FreeRDP/commit/056cede398d71c1f2540baebc26ec3327a249301 [Patch]
https://github.com/FreeRDP/FreeRDP/commit/483c9388119f06bac420d92053cff9ef94e83bea [Patch]
https://github.com/FreeRDP/FreeRDP/releases/tag/3.31.0 [Product, Release Notes]
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v649-94v2-p72q [Exploit, Mitigation, Vendor Advisory]
https://www.vulncheck.com/advisories/freerdp-before-3.31.0-information-disclosure-via-uninitialized-heap-memory [Patch, Release Notes, Third Party Advisory]

Authoritative record: CVE-2026-85089 at cve.org

Vendors: freerdp

Weaknesses: CWE-908

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-85089 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.