CVE-2026-91955CWE-369

CVE-2026-91955

High · published September 15, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
46.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.2 · CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00572 · 46.6th percentile
Weakness
CWE-369 · Divide By Zero
Published
2026-09-15T20:17Z
Affected products (1)
ProductVersionsFixed in
freerdp/freerdp< 3.31.03.31.0
References (3)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4464-r7qj-pgrx · [email protected]https://www.vulncheck.com/advisories/freerdp-before-3.31.0-denial-of-service-via-desktop-dimensions · [email protected]https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4464-r7qj-pgrx · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 15:18Z
    FreeRDP before 3.31.0 Denial of Service via Desktop Dimensions
    cvelistv5