CVE-2026-57919: Matrix42 Empirum · Incorrect Default Permissions
Source CVE Database V5
Not known to be exploited · CVSS 7.8 High.
Data as of 26 Oct 2026, 15:59 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Affects
- Matrix42 Empirum before 25.5
CVSS:3.1/AC:L/AV:L/A:H/C:H/I:H/PR:L/S:U/UI:NExploitation evidence
Disclosed: evidence found.
CVE published 29 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
Until an official fix is available, restrict access to the named pipe if possible and monitor for suspicious local activity. Avoid placing untrusted executables in directories that could be used in the untrusted search path exploitation. Follow vendor updates closely for an official fix.
Description
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.
References
- matrix42.com (opens in a new tab)
- docs.matrix42.com/en_US/1041748_vulnerability-list/cve-2026-57919-privilege-escalation-in-empirum-personal-backup (opens in a new tab)
- docs.matrix42.com/1041748_vulnerability-list/3862631_cve-2026-57919-privilege-escalation-in-empirum-personal-backup/ (opens in a new tab)