CVE-2026-65421CWE-125

CVE-2026-65421

Medium · published July 31, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
20.0
In the wild
Unconfirmed
What it is

The MMS BER decoder contains a flaw in decoding fixed-width BER fields

(boolean/integer): an attacker-supplied length value is not validated,

causing a read past the end of a heap buffer. This leads to termination

of the MMS service process and a denial-of-service condition.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00285 · 20.0th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-07-31T03:16Z
References (2)
EPSS history
Timeline
  • 30 JUL 22:35Z
    MZ Automation libiec61850 Out-of-bounds Read
    cvelistv5