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CVE-2026-66349 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  ICS-CERT
CVSS-B 6.9 MEDIUM
Vector:  CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
ICS-CERT
ICS-CERT

Weakness Enumeration

CWE-ID CWE Name Source
CWE-125 Out-of-bounds Read ICS-CERT  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-66349
NVD Published Date:
07/30/2026
NVD Last Modified:
07/30/2026
Source:
ICS-CERT