CVE-2026-57919

SYSTEM privilege escalation via untrusted executable search path

Published Jun 29, 2026 · Updated Jun 29, 2026

Local privilege escalation in Matrix42 Empirum before 25.5 and 26.x before 26.2 allows local users to execute commands as SYSTEM. PBackupVSS.exe exposes the \.\pipe\PBackupVSS named pipe to all authenticated users, then resolves shadow.exe through an attacker-controlled working directory. A low-privileged account can send crafted IPC messages that make the privileged process launch the planted executable with full SYSTEM authority.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local privilege escalation in Matrix42 Empirum before 25.5 and 26.x before 26.2 allows local users to execute commands as SYSTEM. PBackupVSS.exe exposes the \.\pipe\PBackupVSS named pipe to all authenticated users, then resolves shadow.exe through an attacker-controlled working directory. A low-privileged account can send crafted IPC messages that make the privileged process launch the planted executable with full SYSTEM authority.

The record

CVE
CVE-2026-57919
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-426, CWE-276, T1574.008
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8MITRECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-426Untrusted Search Path
CWE-276Incorrect Default Permissions
T1574.008Path Interception by Search Order Hijacking

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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