CVE-2026-66349
MEDIUM
MEDIUM
Priority: 0.02
BB Relevance:
49/100
Published: 2026-07-30
Modified: 2026-10-23
First seen: 2026-10-29
Status: active
Attack Surface
Adjacent
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Adjacent
AC:
Low
PR:
Low
UI:
None
S:
X
AT:
None
VC:
None
VI:
None
VA:
High
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.