CVE-2026-76881

Analyzed Analyzed - Analysis Complete

CMS Protocol Dissector Crash in Wireshark

Publication date: 2026-08-19

Last updated on: 2026-09-01

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

2026-09-01

Generated

2026-09-09

AI Q&A

2026-08-20

EPSS Evaluated

2026-09-07

NVD

CVE-2026-76881

EUVD

EUVD-2026-63138

Affected Vendors & Products

Vendor	Product	Version / Range
wireshark	wireshark	From 4.6.0 (inc) to 4.6.8 (exc)
wireshark	wireshark	From 4.4.0 (inc) to 4.4.18 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-476	The product dereferences a pointer that it expects to be valid but is NULL.

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.

Detection Guidance

This vulnerability is specific to a CMS protocol dissector crash in versions 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18, leading to denial of service. Detection requires checking the version of the affected software. If you are running Wireshark or a related tool with the vulnerable dissector, verify the version matches the affected range.

Impact Analysis

The vulnerability allows an attacker to cause a denial of service by crashing the CMS protocol dissector. This could lead to service unavailability or degraded performance for systems using affected versions.

Compliance Impact

This vulnerability causes a denial of service due to a protocol dissector crash, which may disrupt system availability. Compliance with standards like GDPR or HIPAA often requires maintaining system availability and integrity, so such disruptions could impact compliance efforts.

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).

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