Use After Free Vulnerability in MZ Automation libiec61850 Version 1.6.1
CVE-2026-19108

4.8MEDIUM

Key Information:

Vendor

Mz Automation

Status
Libiec61850
Vendor
CVE Published:
6 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19108?

A use after free vulnerability was identified in MZ Automation's libiec61850 version 1.6.1 impacting the deleteDataSetValuesShadowBuffer function within the URCB Revalidation component. This flaw enables local attackers to manipulate memory allocation, potentially leading to application crashes or control flow hijacking. It has been publicly disclosed and can be exploited locally without requiring elevated privileges. To mitigate this risk, users are strongly encouraged to upgrade to version 1.6.2, which includes the necessary patches to resolve the issue.

Affected Version(s)

libiec61850 1.6.0

libiec61850 1.6.1

libiec61850 1.6.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-19108 - Proof of Concept

References

https://vuldb.com/vuln/386569
vdb-entrytechnical-description
https://vuldb.com/vuln/386569/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19108
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Chuan Wei
VULL (VulDB User)
SCU_1CP (VulDB User)
.