PBackupVSS.exe in Matrix42 Empirum before 25.5 and 26.x before 26.2 creates a named pipe (\\.\pipe\PBackupVSS) with a DACL that grants GENERIC_READ and GENERIC_WRITE permissions to all authenticated …
Summary
PBackupVSS.exe in Matrix42 Empirum before 25.5 and 26.x before 26.2 creates a named pipe (\\.\pipe\PBackupVSS) with a DACL that grants GENERIC_READ and GENERIC_WRITE permissions to all authenticated users. A low-privileged local attacker can connect to this pipe and send crafted IPC messages to trigger execution of arbitrary commands with SYSTEM privileges via an untrusted search path. This allows privilege escalation by placing a malicious shadow.exe in a controlled working directory.
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Lint boundary warnings (3)
The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).
-
REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://docs.matrix42.com/1041748_vulnerability-list/3862631_cve-2026-57919-privilege-escalation-in-empirum-personal-backup/ -
REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://docs.matrix42.com/en_US/1041748_vulnerability-list/cve-2026-57919-privilege-escalation-in-empirum-personal-backup -
REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://matrix42.com
Sources
- NVD DATABASE
Original Links
- https://docs.matrix42.com/1041748_vulnerability-list/3862631_cve-2026-57919-privilege-escalation-in-empirum-personal-backup/
- https://docs.matrix42.com/en_US/1041748_vulnerability-list/cve-2026-57919-privilege-escalation-in-empirum-personal-backup
- https://matrix42.com
Timeline
- nvd_ingest NVD