Out-of-bounds Read Affecting xrdp package, versions <0.10.6.1-2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-XRDP-17894871
- published8 Jul 2026
- disclosed20 Jul 2026
Introduced: 8 Jul 2026
CVE-2026-55639 (opens in a new tab)How to fix?
Upgrade Debian:unstable xrdp to version 0.10.6.1-2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xrdp package and not the xrdp package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the parsing of Client Security Data within the Client MCS Connect Initial PDU with GCC Conference Create Request during the connection sequence. During the initial capability and security negotiation phase, the parser fails to perform sufficient length validation for the incoming data block. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted RDP packet containing malformed data. Due to missing bounds checks, the xrdp process may read a small number of bytes beyond the declared data block boundary, potentially disclosing process memory contents that could be combined with other vulnerabilities. This issue has been fixed in version 0.10.6.1.