Pre-authentication crash and disclosure via capability over-read
Published Apr 17, 2026 · Updated Apr 17, 2026
Out-of-bounds reads in xrdp 0.10.5 and earlier allow remote attackers to crash a connection process or disclose process memory. During RDP capability exchange, the Confirm Active PDU parser accesses memory before checking the remaining buffer length. No authentication or user interaction is required; a crafted PDU can terminate the handling process or expose adjacent process-memory contents.
Summary
What happened
Out-of-bounds reads in xrdp 0.10.5 and earlier allow remote attackers to crash a connection process or disclose process memory. During RDP capability exchange, the Confirm Active PDU parser accesses memory before checking the remaining buffer length. No authentication or user interaction is required; a crafted PDU can terminate the handling process or expose adjacent process-memory contents.
The record
- CVE
- CVE-2026-33516
- Published
- Apr 17, 2026
- Updated
- Apr 17, 2026
- Vendor
- neutrinolabs
- Product
- xrdp
- Classifications
- CWE-125, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 17, 2026CVE publishedPublication date reported by the CVE source.
- Apr 17, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 0.10.6
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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