Out-of-Bounds Read in mz-automation libiec61850 Affects Automation and Control Systems
CVE-2026-18583

6.9MEDIUM

Key Information:

Vendor

Mz-automation

Status
Libiec61850
Vendor
CVE Published:
3 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-18583?

A vulnerability has been discovered in mz-automation's libiec61850 component pertaining to the MMS Request Handler. Specifically, the function checkDataSetAccess within the mms_mapping.c file allows for remote manipulation that may lead to an out-of-bounds read condition. This flaw affects versions up to 1.6.1, with potential implications for the integrity of automation and control systems using this library. Security professionals should be aware that an exploit is publicly available, and upgrading to version 1.6.2 will mitigate the risk posed by this vulnerability.

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-2026-18583 - Proof of Concept

References

https://vuldb.com/vuln/385412
vdb-entrytechnical-description
https://vuldb.com/vuln/385412/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18583
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
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
Carnegie (VulDB User)
Carnegie (VulDB User)
VulDB CNA Team
.