CVE-2026-57919

LPE

Published

29 June 2026

Modified

17 July 2026

CVSS Score v3.1 7.8

Click a component to see what it means

Raw vector

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

EPSS Score 0.0018 7th percentile

Risk Priority 55 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-57919 is a high-severity Incorrect Default Permissions (CWE-276) vulnerability in Matrix42 Empirum (inferred from references). Its CVSS base score is 7.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Path Interception (T1034); ranked at the 7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and AC-6 (Least Privilege) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

EU & UK References

No EU or UK CSIRT advisories indexed for this CVE.

Vulnerability Data

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.

CWE(s): CWE-276 CWE-426

Related Threats

MITRE ATT&CK Enterprise Techniques

T1034 Path Interception Persistence

**This technique has been deprecated.

attack.mitre.org →

T1574 Hijack Execution Flow Stealth

Adversaries may execute their own malicious payloads by hijacking the way operating systems run programs.

attack.mitre.org →

T1574.001 DLL Stealth

Adversaries may abuse dynamic-link library files (DLLs) in order to achieve persistence, escalate privileges, and evade defenses.

attack.mitre.org →

T1574.008 Path Interception by Search Order Hijacking Stealth

Adversaries may execute their own malicious payloads by hijacking the search order used to load other programs.

attack.mitre.org →

T1574.007 Path Interception by PATH Environment Variable Stealth

Adversaries may execute their own malicious payloads by hijacking environment variables used to load libraries.

attack.mitre.org →

T1574.009 Path Interception by Unquoted Path Stealth

Adversaries may execute their own malicious payloads by hijacking vulnerable file path references.

attack.mitre.org →

Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-6974Shared CWE-276, CWE-426

CVE-2026-21280Shared CWE-426

CVE-2025-0459Shared CWE-426

CVE-2023-27764Shared CWE-426

CVE-2024-6975Shared CWE-426

CVE-2023-41766Shared CWE-426

CVE-2024-28133Shared CWE-426

CVE-2026-45772Shared CWE-426

CVE-2026-32032Shared CWE-426

CVE-2024-28060Shared CWE-426

Affected Assets

Matrix42

Empirum

inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Control response

Prevent

Stop it (NIST 800-53)

—

Detect

Catch it (NIST detect / respond)

—

Harden

Shrink the surface (DISA STIG)

7 hardening rules · 2 OS baselines

Validate

Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

AC-3 Access Enforcement good match

Enforces approved authorizations on files and resources so overly permissive defaults cannot be exploited.

AC-6 Least Privilege good match

Requires least-privilege defaults so that installed files are not world-writable by default.

CM-6 Configuration Settings good match

Requires documented, restrictive configuration settings that cover file and directory permissions.

CM-5 Access Restrictions for Change partial match

Enforces access restrictions on changes, including permission settings applied during installation or configuration.

CM-7 Least Functionality partial match

Least-functionality configuration can prohibit unapproved directories or executables from being reachable via search paths.

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles such as trusted paths, complete mediation, and least privilege directly require hard-coded or validated search paths instead of external ones.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-01 full match

prevents

Hardened baselines and configuration management explicitly require correct default file permissions.

PR.PS-05 full match

prevents

Preventing execution of unauthorized code directly blocks the malicious binaries that an untrusted search path would load.

PR.AA-05 mostly match

prevents

Defining and enforcing least-privilege access permissions directly prevents overly permissive defaults at install time.

PR.PS-06 mostly match

prevents

Secure development practices include avoiding or sanitizing externally influenced search paths in application code.

ID.AM-08 partial match

prevents

Lifecycle management can encompass permission settings, yet the control is too broad to specifically mitigate incorrect defaults.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match

finds

Security testing can discover search-path issues but does not itself prevent them in production code.

A.8.9 Configuration management mostly match

prevents

Standard templates that restrict access to utility programs and host parameter settings prevent the assignment of overly permissive default permissions on critical resources.

A.8.19 Installation of software on operational systems partial match

degrades

Restricting software installation reduces the chance that untrusted binaries or libraries are placed in search paths.

A.8.27 Secure system architecture and engineering principles partial match

prevents

Secure architecture principles include hard-coded or validated search paths and avoiding reliance on untrusted directories.

A.8.28 Secure coding partial match

prevents

Secure coding standards require absolute paths or integrity-checked search paths, directly mitigating CWE-426.

Hardening callouts derived

Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).

Windows Server 2016 (2 rules)

V-224833 Permissions for program file directories must conform to minimum requirements. prevents CWE-276
V-224834 Permissions for the Windows installation directory must conform to minimum requirements. prevents CWE-276

Windows Server 2019 (2 rules)

V-205735 Windows Server 2019 permissions for program file directories must conform to minimum requirements. prevents CWE-276
V-205736 Windows Server 2019 permissions for the Windows installation directory must conform to minimum requirements. prevents CWE-276