Vulnerability · Published Apr 17, 2026 · Assigned by GitHub_M
CVE-2026-32105xrdp: RDP MAC signature (dataSignature) never verified on receive — integrity bypass in non-TLS mode
Critical 9.3
In plain English
A critical-severity security flaw in xrdp from neutrinolabs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | xrdp | 0.10.6-r0 | ALPINE-CVE-2026-32105 |
| Alpine:v3.24 | xrdp | 0.10.6-r0 | ALPINE-CVE-2026-32105 |
| Debian:12 | xrdp | 0.9.21.1-1+deb12u3 | DEBIAN-CVE-2026-32105 |
| Debian:13 | xrdp | 0.10.1-3.1+deb13u2 | DEBIAN-CVE-2026-32105 |
| Debian:14 | xrdp | 0.10.6-1 | DEBIAN-CVE-2026-32105 |
| Ubuntu:22.04:LTS | xrdp | no fix listed | UBUNTU-CVE-2026-32105 |
| Ubuntu:24.04:LTS | xrdp | no fix listed | UBUNTU-CVE-2026-32105 |
| Ubuntu:25.10 | xrdp | no fix listed | UBUNTU-CVE-2026-32105 |
| Ubuntu:26.04:LTS | xrdp | no fix listed | UBUNTU-CVE-2026-32105 |
| Ubuntu:26.10 | xrdp | no fix listed | UBUNTU-CVE-2026-32105 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| neutrinolabs | xrdp | < 0.10.6 |
Weakness: CWE-354 · 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
References
- https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-j2jm-c596-c5q3 x_refsource_CONFIRM
- https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6 x_refsource_MISC