Vulnerability in Neutrinolabs Xrdp
CVE-2026-55238
xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of RDP Confirm Active PDU, where during the capability negotiation phase, the parser did not perform sufficient length validation for specific capability sets. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted RDP packet containing malformed capability data. Due to missing bounds checks, the xrdp process may perform out-of-bounds memory reads, which can result in the termination of the service (Denial of Service). However, since xrdp forks a new process for each connection by default, an out-of-bounds read causing a process crash is unlikely to bring down the entire xrdp service. This issue has been fixed in version 0.10.6.1.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (43.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Neutrinolabs Xrdp — versions < 0.10.6.1
Weakness classification (CWE)
References
- github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1 (Release Notes)
- github.com/neutrinolabs/xrdp/security/advisories/GHSA-mg8j-x9rw-9xv3 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-55238?
- CVE-2026-55238 is a medium-severity vulnerability in Neutrinolabs Xrdp, classified under Buffer Over-read. CVSS score: 5.3/10. Published 2026-07-20.
- How severe is CVE-2026-55238?
- Medium severity. CVSS v3 base score is 5.3 out of 10.