Heap-based buffer overflow in FreeRDP - CVE-2026-44420

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Main Vulnerability Database Vulnerabilities #VU131105

Heap-based buffer overflow in FreeRDP - CVE-2026-44420

Published: May 12, 2026


Vulnerability identifier: #VU131105
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-44420
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
FreeRDP
Software vendor:
FreeRDP

Description

The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to heap-based buffer overflow in the server-side clipboard (cliprdr) channel capability parsing routine when processing a CB_CLIP_CAPS PDU with an undersized capabilitySetLength value. A remote user can send a specially crafted CB_CLIP_CAPS PDU to execute arbitrary code.

Affected systems must have the cliprdr server channel enabled.


Remediation

Install security update from vendor's website.

External links