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CVE-2026-33516

xrdp: Pre-authentication out-of-bounds reads in RDP capability and channel parsers

Published: Apr 17, 2026Updated: Apr 27, 2026 Sources: CVE List NVD BDUCWE-125
NVD MITRE
9.1CVSSCRITICAL
EPSS Score
0.4%
Top 66.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-125

Affected Products

xrdpneutrinolabs
On-prem
Networking Infrastructure / network-management
АЛЬТ СП 10АО «ИВК»
On-premOS
Operating Systems / linux-distro
xrdpСообщество свободного программного обеспеченияOperating Systems / linux-distro
neutrinolabsoss-projectNetworking Infrastructure
ао «ивк»commercialRUOperating Systemsaka ivk
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6
github.com
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-rvh9-9wm3-28c7
github.com
https://altsp.su/obnovleniya-bezopasnosti/
altsp.su

Timeline

Published
Apr 17, 2026
Last Updated
Apr 27, 2026

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