Use-after-free in FreeRDP - CVE-2026-25959
Published: April 8, 2026
Vulnerability identifier: #VU125354
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-25959
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FreeRDP
Affected software:
FreeRDP
FreeRDP
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service and potentially execute arbitrary code.
The vulnerability exists due to use-after-free in xf_cliprdr_provide_data_ when processing clipboard format data responses concurrently with cached clipboard data clearing. A remote attacker can send a malicious clipboard data response from a server to cause a denial of service and potentially execute arbitrary code.
The issue is client-side and requires clipboard redirection support to be enabled.
How to mitigate CVE-2026-25959
Install security update from vendor's website.