CVE-2026-18583 mz-automation libiec61850 MMS Request mms_mapping.c checkDataSetAccess out-of-bounds
Remote attackers can trigger an out-of-bounds read in libiec61850 via MMS requests, potentially causing information disclosure or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18583?
CVE-2026-18583 is a medium-severity memory corruption vulnerability in mz-automation libiec61850, published on 3 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A weakness has been identified in mz-automation libiec61850 up to 1.6.1. This issue affects the function checkDataSetAccess of the file src/iec61850/server/mms_mapping/mms_mapping.c of the component MMS Request Handler. This manipulation causes out-of-bounds read. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 1.6.2 is capable of addressing this issue. Patch name: 062062daf4cb50c7aa76e01d6fb4d58fc9278a7d. Upgrading the affected component is recommended. The vendor was contacted early about this disclosure.
Which versions are affected by CVE-2026-18583?
How do I fix CVE-2026-18583?
No fix has been published for CVE-2026-18583 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-18583 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18583 exists.
Sources
Also known as GHSA-948g-pq52-gmvq.