CVE-2026-55645: xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of Client Control PDUs. During the RDP connection sequence, the parse
xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of Client Control PDUs. During the RDP connection sequence, the parser does not perform sufficient length validation before reading specific data fields from the network stream. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted, truncated Client Control PDU. 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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-55645
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-556450.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-55645 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for xrdp is an
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- mediumCVE-2026-55639: xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concernin…nvd · 2026-07-20
- highCVE-2026-55626: xrdp is an open source RDP server. In versions 0.10.6 and prior, when an authenticated user se…nvd · 2026-07-20
- mediumCVE-2026-55238: xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concernin…nvd · 2026-07-20
- highCVE-2026-54538: xrdp is an open source RDP server. In versions 0.10.6 and prior, a n issue was discovered wher…nvd · 2026-07-20
- mediumCVE-2026-44978: xrdp is an open source RDP server. Versions 0.10.6 and prior contain a heap out-of-bounds read…nvd · 2026-07-20
- highCVE-2026-44178: xrdp is an open source RDP server. Versions 0.10.6 and prior contain a heap-based buffer overf…nvd · 2026-07-20
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