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  4. CVE 2026 121951 freerdp 300 before 3322 denial of service via
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Back to active CVEs
High · CVSS 8.7CVE-2026-121951

FreeRDP 3.0.0 before 3.32.2 Denial of Service via Slow-Path Input EventCVE-2026-121951

Answer in brief

CVE-2026-121951 records a High severity (CVSS 8.7) vulnerability in FreeRDP 3.0.0 before 3.32.2 Denial of Service via Slow-Path Input Event. The current sources do not mark it as known exploited. The current feed maps FreeRDP/FreeRDP (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 4, 2026Updated Nov 4, 2026Source checked Nov 4, 2026First seen by HOL Nov 4, 2026Material review Nov 4, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps FreeRDP/FreeRDP (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
FreeRDP/FreeRDPgeneric>=3.0.0 <3.32.23.32.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for FreeRDP/FreeRDP.
  2. 2Review the reported fix. Update FreeRDP/FreeRDP to 3.32.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 4, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

FreeRDP 3.0.0 before 3.32.2 server-side RDP peer input parsing skips the six-byte body of a slow-path input event with an unknown message type without checking it lies within the packet's declared length, causing a WinPR stream assertion failure. A remote RDP client with an active session can send a truncated unknown input event to abort assertion-enabled server processes, causing denial of service.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • FreeRDP before 3.32.2 Heap Overflow via RDPGFX CREATE_SURFACE Integer WrapSame freerdp/freerdp package
  • FreeRDP before 3.32.2 Proxy Out-of-Bounds Write via Bitmap Cache v2 CapabilitySame freerdp/freerdp package
  • FreeRDP before 3.32.2 Use-After-Free via rdpgfx Dynamic Virtual Channel CloseSame freerdp/freerdp package
  • FreeRDP before 3.32.2 Heap Out-of-Bounds Write in Planar CodecSame freerdp/freerdp package
  • FreeRDP before 3.32.2 Use-After-Free in Smartcard Emulation ReleaseContextSame freerdp/freerdp package
  • FreeRDP before 3.32.2 Double Free in WinPR Kerberos retrieveSomeTgtSame freerdp/freerdp package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-617
Source
CVE List V5
Source checked
Nov 4, 2026
References
2 linked sources
Open source record