Critical severity · published Jul 20, 2026
CVE-2026-41252
xrdp: lib_palette_update Heap Buffer Overflow & RCE
9.8
CVSS
1.1%
EPSS
No
On KEV
Description
xrdp is an open source RDP server. Versions 0.10.6 and prior contain a missing bounds check in xrdp, which allows a heap-based buffer overflow when operating in vnc-any mode. The issue occurs during the handling of RFB protocol color map messages from a VNC server, where incoming color indices are not properly validated. A malicious VNC server can exploit this flaw by sending crafted messages with out-of-range values, leading to an out-of-bounds write on the heap. This memory corruption can result in a denial of service (DoS) or potentially allow remote code execution (RCE) prior to authentication. This issue has been fixed in version 0.10.6.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
XR
xrdp · neutrinolabs
< 0.10.6.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41252
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-41252
Release Notes
https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1
Mitigation
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-w5vg-6qmv-j63j
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