Buffer overflow in Neutrinolabs Xrdp
CVE-2026-32623
xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in the NeutrinoRDP module. When proxying RDP sessions from xrdp to another server, the module fails to properly validate the size of reassembled fragmented virtual channel data against its allocated memory buffer. A malicious downstream RDP server (or an attacker capable of performing a Man-in-the-Middle attack) could exploit this flaw to cause memory corruption, potentially leading to a Denial of Service (DoS) or Remote Code Execution (RCE). The NeutrinoRDP module is not built by default. This vulnerability only affects environments where the module has been explicitly compiled and enabled. Users can verify if the module is built by checking for --enable-neutrinordp in the output of the xrdp -v command. This issue has been fixed in version 0.10.6.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (54.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.1% 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: 0.008 · change: +0.002
Affected products
- Neutrinolabs Xrdp — versions < 0.10.6
Weakness classification (CWE)
References
- github.com/neutrinolabs/xrdp/security/advisories/GHSA-phw3-qp59-x2v4 (Vendor Advisory)
- github.com/neutrinolabs/xrdp/releases/tag/v0.10.6 (Patch, Release Notes)
Frequently asked questions
- What is CVE-2026-32623?
- CVE-2026-32623 is a high-severity vulnerability in Neutrinolabs Xrdp, classified under Heap-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-04-17.
- How severe is CVE-2026-32623?
- High severity. CVSS v3 base score is 8.1 out of 10.