CVE-2026-19108 MZ Automation CVE debrief

Who should care

Users of libiec61850 up to version 1.6.1, especially those with local access to affected systems, should review and apply the patch or upgrade to version 1.6.2. System administrators and security teams responsible for affected deployments should prioritize this vulnerability due to its local attack vector and potential impact on system integrity.

Technical summary

The deleteDataSetValuesShadowBuffer function in libiec61850 up to 1.6.1 contains a use-after-free vulnerability. Local attackers can exploit this issue. Upgrading to version 1.6.2 or applying patch 486fd57f3aed65bb9d636ff00f9ddce2e450b168 mitigates the vulnerability. Affected product deployments should be reviewed for potential exposure, and defensive measures should be implemented to prevent exploitation.

Defensive priority

Low-priority defensive review recommended due to local attack vector and low CVSS score.

Recommended defensive actions

• Review and apply patch 486fd57f3aed65bb9d636ff00f9ddce2e450b168
• Upgrade to libiec61850 version 1.6.2 or later
• Monitor local system access for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The vulnerability, identified as CVE-2026-19108, exists in the deleteDataSetValuesShadowBuffer function of libiec61850 up to version 1.6.1. Evidence from Vuldb and NVD suggests a use-after-free vulnerability. Limited details on POC exploit usage are available. Users should verify affected systems and review patch 486fd57f3aed65bb9d636ff00f9ddce2e450b168 for applicability. Defensive review is recommended due to the local attack vector and low CVSS score. Further verification of system configurations and potential exposure is necessary.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.