Integer overflow in xrdp - CVE-2026-41521
Published: July 2, 2026
Vulnerability identifier: #VU136788
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-41521
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: neutrinolabs
Affected software:
xrdp
xrdp
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information or cause a denial of service.
The vulnerability exists due to integer overflow in screen update message processing in vnc-any mode when processing crafted image dimensions from a VNC server. A remote attacker can send crafted screen update messages to disclose sensitive information or cause a denial of service.
Exploitation requires the vnc-any connection mode or another configuration that allows connections to arbitrary VNC hosts.
How to mitigate CVE-2026-41521
Install security update from vendor's website.