Vulnerability Description
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.
CVSS Score
6.5
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Related Weaknesses (CWE)
References
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-21
- https://github.com/mz-automation/lib60870/security/advisories/GHSA-g3w7-x5rx-83x
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-11
- https://github.com/mz-automation/lib60870/security/advisories/GHSA-g3w7-x5rx-83x
FAQ
What is CVE-2026-61893?
CVE-2026-61893 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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.
How severe is CVE-2026-61893?
CVE-2026-61893 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-61893?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.