CVE-2026-91958

Medium

Description

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.

SeverityMedium

CVSS6.6

Exploit probability—

ProductFreerdp

PublishedSep 15, 2026

First seenSep 15, 2026

Weakness typeCWE-125Out-of-bounds read

How to fix

Update

freerdp freerdp3.31.0 or later

Vendor advisories

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-23pf-q83q-x45r

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	3.11.0 ≤ v < 3.31.0	3.31.0

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