CVE-2026-61893

A crafted IEC 60870-5-104 I-frame with TypeID 104 (C_TS_NA_1) and an inflated object count causes TestCommand_getFromBuffer to read one byte past the end of the heap-allocated message buffer.

Score

CVSS 4.0 6.9 Medium

Status

Deferred - ics-cert@hq.dhs.gov

Published

2026-07-30

Last modified

2026-10-23

Weaknesses

CWE-125

Affected products

• Lib60870 (Mz Automation)

References

• https://github.com/mz-automation/lib60870/security/advisories/GHSA-g3w7-x5rx-83xm
• https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-11
• https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-11.json