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CVE-2026-91958

FreeRDP 3.11.0 through 3.30.0 Heap Buffer Overflow via Monitor Index

CVSS 4.0 6.9 MEDIUMCVSS 3.1 6.6 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-91958

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-91958

Published

FreeRDP

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "FreeRDP",
                    "product": "FreeRDP",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "versionType": "semver",
                            "version": "3.11.0",
                            "lessThan": "3.31.0",
                            "status": "affected"
                        },
                        {
                            "versionType": "semver",
                            "version": "3.31.0",
                            "status": "unaffected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON