Claude Desktop
Monthly
Local privilege escalation in Claude Desktop for Windows prior to 1.3834.0 allows a low-privileged user to gain SYSTEM-level file write primitives by abusing the CoworkVMService component. The service fails to validate whether the user-writable VM bundle directory is a real directory or an NTFS directory junction, enabling a classic link-following attack. No public exploit identified at time of analysis, and EPSS is negligible (0.01%), but SSVC rates technical impact as total.
Man-in-the-middle attacks against Claude Desktop's SSH remote development feature are possible in versions 1.2581.0 through 1.4303.x because the client only checks that a hostname exists in ~/.ssh/known_hosts without verifying that the server's presented host key matches the stored key. A network-positioned adversary can substitute an arbitrary host key during an SSH handshake and have the connection silently accepted, allowing interception or modification of remote developer sessions. No public exploit identified at time of analysis, and EPSS (0.02%) plus SSVC (Exploitation: none) indicate no active exploitation despite the high CVSS 4.0 score of 7.4.
Local privilege escalation in Claude Desktop for Windows prior to 1.3834.0 allows a low-privileged user to gain SYSTEM-level file write primitives by abusing the CoworkVMService component. The service fails to validate whether the user-writable VM bundle directory is a real directory or an NTFS directory junction, enabling a classic link-following attack. No public exploit identified at time of analysis, and EPSS is negligible (0.01%), but SSVC rates technical impact as total.
Man-in-the-middle attacks against Claude Desktop's SSH remote development feature are possible in versions 1.2581.0 through 1.4303.x because the client only checks that a hostname exists in ~/.ssh/known_hosts without verifying that the server's presented host key matches the stored key. A network-positioned adversary can substitute an arbitrary host key during an SSH handshake and have the connection silently accepted, allowing interception or modification of remote developer sessions. No public exploit identified at time of analysis, and EPSS (0.02%) plus SSVC (Exploitation: none) indicate no active exploitation despite the high CVSS 4.0 score of 7.4.