VULNERABILITY INTELLIGENCE
CVE-2026-66349
CVSS score6.5 MEDIUM
EPSS probability0.29%
CISA KEVNot currently listed
Published2026-07-30
Last modified2026-10-23
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
The MMS server connection handler contains a flaw in its processing of BER-encoded request data. When an MMS confirmed request PDU containing an extended BER tag is received over an established session, the decoder may advance its internal buffer incorrectly due to a missing bounds check. This results in a one byte heap out-of-bounds read and causes the MMS service process to terminate, leading to a denial-of-service condition.
Weakness classification
- ics-cert@hq.dhs.gov: CWE-125