CVE-2026-91958CWE-125

CVE-2026-91958

Medium · published September 15, 2026

CVSS v3.1
6.6
EPSS
0%
Percentile
8.9
In the wild
Unconfirmed
What it is

FreeRDP versions before 3.31.0 fail to validate MonitorIds array values when parsing RDP connection files, allowing unbounded array indexing in xf_detect_monitors. Attackers can craft a malicious RDP file with an out-of-range selectedmonitors value to trigger out-of-bounds heap read and write operations when opened in xfreerdp.

The record
Technical detail
CVSS v3.1
6.6 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
CVSS v4.0
6.9 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
EPSS
0.00197 · 8.9th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-09-15T20:17Z
Affected products (1)
ProductVersionsFixed in
freerdp/freerdp≥ 3.11.0, < 3.31.03.31.0
References (3)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-23pf-q83q-x45r · [email protected]https://www.vulncheck.com/advisories/freerdp-3.11.0-through-3.30.0-heap-buffer-overflow-via-monitor-index · [email protected]https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-23pf-q83q-x45r · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 15:18Z
    FreeRDP 3.11.0 through 3.30.0 Heap Buffer Overflow via Monitor Index
    cvelistv5