CVE-2026-63033
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Summary
A crafted IEC 60870-5-104 I-frame with a declared object count exceeding what fits in the ASDU body causes InformationObject_ParseObjectAddress to read one byte past the end of the heap-allocated message buffer.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| MZ Automation | lib60870 | 2.4.0 | affected |
| MZ Automation | lib60870 | 2.4.1 | unaffected |
Weaknesses
- CWE-125: CWE-125
References
- https://github.com/mz-automation/lib60870/security/advisories/GHSA-7v97-jmwv-w5j7
- 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
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