neutrinolabs xrdp up to 0.10.6 vnc-any connection mode integer overflow

Summaryinfo

A vulnerability was found in neutrinolabs xrdp up to 0.10.6 and classified as critical. Affected by this issue is some unknown functionality of the component vnc-any connection mode. Such manipulation leads to integer overflow. This vulnerability is listed as CVE-2026-41521. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in neutrinolabs xrdp up to 0.10.6 and classified as critical. Affected by this issue is an unknown code of the component vnc-any connection mode. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. CVE summarizes:

xrdp is an open source RDP server. Versions 0.10.6 and prior contain an integer overflow vulnerability when processing screen update messages within the vnc-any connection mode. A malicious remote VNC server can send crafted image dimensions that cause an integer overflow during memory buffer size calculation, resulting in an undersized allocation. Subsequent processing of the incoming image data using the original oversized parameters leads to an out-of-bounds read. An unauthenticated remote attacker could exploit this flaw to disclose sensitive information from the heap memory or cause a denial of service (DoS) via a process crash. This issue has been fixed in version 0.10.6.1.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-41521 since 04/20/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version 0.10.6.1 eliminates this vulnerability.

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Productinfo

Vendor

• neutrinolabs

Name

• xrdp

Version

• 0.10.0
• 0.10.1
• 0.10.2
• 0.10.3
• 0.10.4
• 0.10.5
• 0.10.6

Website

• Product: https://github.com/neutrinolabs/xrdp/

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