CVE-2026-63033CWE-125

CVE-2026-63033

Medium · published July 31, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
38.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00458 · 38.7th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-07-31T03:16Z
References (4)
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-11.json · [email protected]https://github.com/mz-automation/lib60870/security/advisories/GHSA-7v97-jmwv-w5j7 · [email protected]https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-11 · [email protected]https://github.com/mz-automation/lib60870/security/advisories/GHSA-7v97-jmwv-w5j7 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 30 JUL 22:54Z
    MZ Automation lib60870 Out-of-bounds Read
    cvelistv5