CVE-2026-33689 xrdp: Pre-authentication out-of-bounds reads in channel parsers

xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted sequence of packets during the initial connection phase...

CVE-2026-33689

xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted sequence of packets during the initial connection phase...

CVE-2026-33689

xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted sequence of packets during the initial connection phase...

CVE-2026-33689 xrdp: Pre-authentication out-of-bounds reads in channel parsers

xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted sequence of packets during the initial connection phase...

CVE-2026-33689

Summary of CVE-2026-33689 (xrdp): A pre-authentication out-of-bounds read vulnerability in the RDP channel parsers affects xrdp versions up to 0.10.5. An unauthenticated remote attacker can trigger the flaw by sending a crafted sequence of packets during the initial connection, due to insufficien...

CVE-2026-33689 xrdp: Pre-authentication out-of-bounds reads in channel parsers

xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted sequence of packets during the initial connection phase...

CVE-2026-33689

xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted sequence of packets during the initial connection phase...

UBUNTU-CVE-2026-32623

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in the NeutrinoRDP module. When proxying RDP sessions from xrdp to another server, the module fails to properly validate the size of reassembled fragmented virtual channel data against it...

UBUNTU-CVE-2026-32107

xrdp is an open source RDP server. In versions through 0.10.5, the session execution component did not properly handle an error during the privilege drop process. This improper privilege management could allow an authenticated local attacker to escalate privileges to root and execute arbitrary co...

CVE-2026-32624

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in its logon processing. In environments where domainuserseparator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain...

CVE-2026-32107

xrdp is an open source RDP server. In versions through 0.10.5, the session execution component did not properly handle an error during the privilege drop process. This improper privilege management could allow an authenticated local attacker to escalate privileges to root and execute arbitrary co...

CVE-2026-32623

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in the NeutrinoRDP module. When proxying RDP sessions from xrdp to another server, the module fails to properly validate the size of reassembled fragmented virtual channel data against it...

CVE-2026-33516

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 vulnerabilit...

UBUNTU-CVE-2026-32624

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in its logon processing. In environments where domainuserseparator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain...

UBUNTU-CVE-2026-32105

xrdp is an open source RDP server. In versions through 0.10.5, xrdp does not implement verification for the Message Authentication Code MAC signature of encrypted RDP packets when using the "Classic RDP Security" layer. While the sender correctly generates signatures, the receiving logic lacks th...

UBUNTU-CVE-2026-33516

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 vulnerabilit...

CVE-2026-33145

xrdp is an open source RDP server. Versions through 0.10.5 allow an authenticated remote user to execute arbitrary commands on the server due to unsafe handling of the AlternateShell parameter in xrdp-sesman. When the AllowAlternateShell setting is enabled which is the default when not explicitly...

CVE-2026-33145

xrdp (open source RDP server) versions up to 0.10.5 are affected by an authenticated remote command execution vulnerability in xrdp-sesman. When AllowAlternateShell is enabled (default if not configured), a client-supplied AlternateShell is passed and executed via /bin/sh -c during session initia...

CVE-2026-33145 xrdp: Authenticated RCE via unsanitized AlternateShell execution in xrdp-sesman

xrdp is an open source RDP server. Versions through 0.10.5 allow an authenticated remote user to execute arbitrary commands on the server due to unsafe handling of the AlternateShell parameter in xrdp-sesman. When the AllowAlternateShell setting is enabled which is the default when not explicitly...

CVE-2026-33145 xrdp: Authenticated RCE via unsanitized AlternateShell execution in xrdp-sesman

xrdp is an open source RDP server. Versions through 0.10.5 allow an authenticated remote user to execute arbitrary commands on the server due to unsafe handling of the AlternateShell parameter in xrdp-sesman. When the AllowAlternateShell setting is enabled which is the default when not explicitly...