Critical severity · published Apr 17, 2026
CVE-2026-33516
xrdp: Pre-authentication out-of-bounds reads in RDP capability and channel parsers
9.1
CVSS
0.4%
EPSS
No
On KEV
Description
xrdp is an open source RDP server. Versions through 0.10.5 contain an out-of-bounds read vulnerability during the RDP capability exchange phase. The issue occurs when memory is accessed before validating the remaining buffer length. A remote, unauthenticated attacker can trigger this vulnerability by sending a specially crafted Confirm Active PDU. Successful exploitation could lead to a denial of service (process crash) or potential disclosure of sensitive information from the process memory. This issue has been fixed in version 0.10.6.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% 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 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33516
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33516
Patch
https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6
Vendor Advisory
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-rvh9-9wm3-28c7
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