CVE-2026-91955

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4464-r7qj-pgrx	Exploit Vendor Advisory
https://www.vulncheck.com/advisories/freerdp-before-3.31.0-denial-of-service-via-desktop-dimensions	Exploit Mitigation Third Party Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4464-r7qj-pgrx	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

24 Sep 2026, 12:16

Type	Values Removed	Values Added
CPE		cpe:2.3:a:freerdp:freerdp::::::::
First Time		Freerdp freerdp Freerdp
References	~~() https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4464-r7qj-pgrx -~~	() https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4464-r7qj-pgrx - Exploit, Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/freerdp-before-3.31.0-denial-of-service-via-desktop-dimensions -~~	() https://www.vulncheck.com/advisories/freerdp-before-3.31.0-denial-of-service-via-desktop-dimensions - Exploit, Mitigation, Third Party Advisory

Information

Published : 2026-09-15 16:17

Updated : 2026-09-24 12:16

NVD link : CVE-2026-91955

Mitre link : CVE-2026-91955

CVE.ORG link : CVE-2026-91955

JSON object : View

Products Affected

freerdp

freerdp

CWE

CWE-369

Divide By Zero

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