CVE-2026-76921

Received Received - Intake

CMS Protocol Dissector DoS in Wireshark

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: GitLab Inc.

Description

CMS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-19

Last Modified

2026-08-19

Generated

2026-08-20

AI Q&A

2026-08-20

EPSS Evaluated

N/A

NVD

CVE-2026-76921

EUVD

EUVD-2026-63170

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This vulnerability is a denial of service issue in CMS protocol dissectors affecting versions 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18. It causes a crash in the dissector, leading to service disruption.

Impact Analysis

The vulnerability allows attackers to cause a denial of service by crashing the CMS protocol dissector. This can disrupt services relying on affected versions, leading to downtime or unavailability.

Mitigation Strategies

Update the affected CMS protocol dissector to a version outside the vulnerable range (4.6.0 to 4.6.7 and 4.4.0 to 4.4.18). Disable or restrict access to the dissector if immediate updates are not possible.

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