CVE-2026-55639: medium-severity vulnerability in neutrinolabs xrdp
xrdp: Out-of-bounds read in GCC Conference Create Request CS_SECURITY processing (xrdp_sec_process_mcs_data_CS_SECURITY)
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.4%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
neutrinolabs · xrdpRelated CVEs — neutrinolabs xrdp
In the same product, most dangerous first.
CVE-2020-4044HIGHLocal users can perform a buffer overflow attack against the xrdp-sesman service and then impersonate itEPSS 2.3%CVE-2025-68670CRITICALxrdp improperly checks bounds of domain string length, which leads to Stack-based Buffer OverflowEPSS 1.4%CVE-2026-41252CRITICALxrdp: lib_palette_update Heap Buffer Overflow & RCEEPSS 1.1%CVE-2022-23493CRITICALOut of Bound Read in xrdpEPSS 1.0%CVE-2022-23477CRITICALBuffer Overflow in xrdpEPSS 0.9%CVE-2022-23480CRITICALBuffer Overflow in xrdpEPSS 0.9%