CVE-2026-76881: CWE-476: NULL Pointer Dereference in Wireshark Foundation Wireshark
A NULL pointer dereference vulnerability exists in the CMS protocol dissector of Wireshark versions 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18. This flaw can cause the application to crash, resulting in a denial of service condition. The vulnerability has a medium severity rating with a CVSS score of 4.7.
AI Analysis
Technical Summary
CVE-2026-76881 is a NULL pointer dereference vulnerability (CWE-476) in the CMS protocol dissector component of Wireshark. It affects versions 4.6.0 through 4.6.7 and 4.4.0 through 4.4.18. When triggered, this vulnerability causes the Wireshark application to crash, leading to denial of service. The CVSS v3.1 base score is 4.7, reflecting a medium severity with local attack vector, high attack complexity, no privileges required, and user interaction needed. There is no indication of confidentiality or integrity impact, only availability is affected. No official patch or remediation level has been published yet, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation causes a denial of service by crashing Wireshark through a NULL pointer dereference in the CMS protocol dissector. There is no impact on confidentiality or integrity. The attack requires local access, high complexity, and user interaction, limiting the ease of exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should avoid processing untrusted CMS protocol data or use a Wireshark version not affected by this vulnerability.
CVE-2026-76881: CWE-476: NULL Pointer Dereference in Wireshark Foundation Wireshark
Description
A NULL pointer dereference vulnerability exists in the CMS protocol dissector of Wireshark versions 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18. This flaw can cause the application to crash, resulting in a denial of service condition. The vulnerability has a medium severity rating with a CVSS score of 4.7.
CVSS v3.1
Score 4.7medium
Affected software
pkg:github/wireshark/wiresharkRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-76881 is a NULL pointer dereference vulnerability (CWE-476) in the CMS protocol dissector component of Wireshark. It affects versions 4.6.0 through 4.6.7 and 4.4.0 through 4.4.18. When triggered, this vulnerability causes the Wireshark application to crash, leading to denial of service. The CVSS v3.1 base score is 4.7, reflecting a medium severity with local attack vector, high attack complexity, no privileges required, and user interaction needed. There is no indication of confidentiality or integrity impact, only availability is affected. No official patch or remediation level has been published yet, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation causes a denial of service by crashing Wireshark through a NULL pointer dereference in the CMS protocol dissector. There is no impact on confidentiality or integrity. The attack requires local access, high complexity, and user interaction, limiting the ease of exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should avoid processing untrusted CMS protocol data or use a Wireshark version not affected by this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T22:34:09.937Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8633c7acd9273b49b8ad42
Added to database: 08/19/2026, 22:52:55 UTC
Last enriched: 08/19/2026, 23:09:06 UTC
Last updated: 08/20/2026, 00:57:10 UTC
Views: 4
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