CVE-2026-32105

NameCVE-2026-32105
Descriptionxrdp is an open source RDP server. In versions through 0.10.5, xrdp does not implement verification for the Message Authentication Code (MAC) signature of encrypted RDP packets when using the "Classic RDP Security" layer. While the sender correctly generates signatures, the receiving logic lacks the necessary implementation to validate the 8-byte integrity signature, causing it to be silently ignored. An unauthenticated attacker with man-in-the-middle (MITM) capabilities can exploit this missing check to modify encrypted traffic in transit without detection. It does not affect connections where the TLS security layer is enforced. This issue has been fixed in version 0.10.6. If users are unable to immediately upgrade, they should configure xrdp.ini to enforce TLS security (security_layer=tls) to ensure end-to-end integrity.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xrdp (PTS)bullseye0.9.21.1-1~deb11u1vulnerable
bullseye (security)0.9.21.1-1~deb11u3vulnerable
bookworm0.9.21.1-1+deb12u1vulnerable
bookworm (security)0.9.21.1-1+deb12u2vulnerable
trixie (security), trixie0.10.1-3.1+deb13u1vulnerable
forky, sid0.10.5-5vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xrdpsource(unstable)(unfixed)

Notes

https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-j2jm-c596-c5q3

Search for package or bug name: Reporting problems