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VULNERABILITIES

CVE-2026-91955 Details

Description

FreeRDP before 3.31.0 fails to validate client-supplied DesktopWidth and DesktopHeight values during GCC negotiation, allowing remote attackers to crash the server. Attackers can send crafted RDP packets with zero or oversized dimensions to trigger division-by-zero or assertion failures in multifragment update capability calculations, terminating the server process.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4464-r7qj-pgrx CISA-ADPExploitVendor Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4464-r7qj-pgrx [email protected]ExploitVendor Advisory
https://www.vulncheck.com/advisories/freerdp-before-3.31.0-denial-of-service-via-desktop-dimensions [email protected]ExploitMitigationThird Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-369Divide By Zero[email protected]

Affected Products

ProductVersions
freerdp freerdp
< 3.31.0

CPE

  • cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-91955
NVD Published Date:
Sep 15, 2026
NVD Last Modified:
Sep 24, 2026
Source:
[email protected]
CVE-2026-91955 Details - Not Deferred