What’s Vulnerable › Vulnerabilities

CVE-2026-63033: MZ Automation lib60870 Out-of-bounds Read

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-30 · updated 2026-10-23
• Weakness: CWE-125

Description

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 products

• MZ Automation lib60870: 2.4.0

References

• https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-11.json
• 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/mz-automation/lib60870/security/advisories/GHSA-7v97-jmwv-w5j7

Get alerted when CVE-2026-63033 or the next vulnerability affects your stack