CVE-2026-32105
xrdp 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.
Scoring
- Severity
- CRITICAL
- CVSS base score
- 9.3
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:H/SI:H/SA:L
- EPSS probability
- 0.17%
- CWE
- CWE-354
- Published
- 2026-04-17
- Last modified
- 2026-04-20
Affected products
- neutrinolabs xrdp
Weakness type
Related vulnerabilities
- CVE-2026-72929 — Windows Installer Elevation of Privilege Vulnerability
- CVE-2026-20354 — Cisco Secure Email S/MIME Ciphertext Decryption Vulnerabilty
- CVE-2026-82549 — Linux Foundation Magma SecurityModeComplete integrity check
- CVE-2026-75803 — AEAD Forgeries with Empty Ciphertext When Using EVP_Cipher()
- CVE-2026-75625 — Kraken Agents Peer-to-Peer Download Cache Poisoning via Digest Verification Bypass
- CVE-2026-12817 — OpenPGP AEAD decryption skips final tag on chunk-aligned data
- CVE-2026-12816 — IESEngine stream-mode MAC forgery via length-dependent KDF split
- CVE-2026-12803 — KCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce AEAD forgery)