CVE-2026-76891 Wireshark Foundation CVE debrief

Who should care

Network administrators and security teams responsible for Wireshark installations should review and address this vulnerability to prevent potential denial-of-service attacks. They should ensure Wireshark versions are up-to-date and monitor security advisories for potential patches or mitigations. Implementing network traffic monitoring can also help detect potential exploitation attempts. Additionally, security teams should consider compensating controls for exposed systems while remediation is scheduled and verified. Review relevant monitoring, detection, and logs for exposed assets that need extra review. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Check for asset inventory and rollback/change windows if needed. Source tracking may also be necessary for verification purposes across different environments and exposures. This requires coordination with operators and platform teams for vulnerability management and security response procedures. Operators should focus on validating affected scope and reviewing context provided by official advisories or CVE records. They should also prioritize updates based on severity and exposure levels across different systems and networks. Security teams must ensure proper change management and verification of updates across different environments and exposures. They should also review compensating controls and implement monitoring to detect potential exploitation attempts. This may involve reviewing logs and implementing additional security measures to prevent denial-of-service attacks. Overall, a coordinated effort is required across different teams and stakeholders to address this vulnerability effectively. This includes reviewing Wireshark version usage, ensuring upgrades to non-vulnerable versions, and implementing compensating controls and monitoring to detect potential exploitation attempts. Security teams should also review official advisories and CVE records to validate affected scope and severity. They should plan vendor-supported updates or mitigansh,

Technical summary

A denial-of-service vulnerability exists in Wireshark versions 4.4.0 to 4.4.18 and 4.6.0 to 4.6.7 due to a crash in the sharkd component. The vulnerability has a CVSS score of 3.1 and is considered low severity. This vulnerability could allow an attacker to cause a denial of service by crashing the sharkd component. Network administrators and security teams should review Wireshark version usage and ensure upgrades to non-vulnerable versions.

Defensive priority

Low-priority defensive review recommended due to limited attack surface and low CVSS score.

Recommended defensive actions

• Review Wireshark version usage and ensure upgrade to a non-vulnerable version
• Monitor Wireshark security advisories for potential patches or mitigations
• Consider implementing network traffic monitoring to detect potential exploitation attempts

Evidence notes

Evidence from official CVE and NVD sources indicates a denial-of-service vulnerability in Wireshark versions 4.4.0 to 4.4.18 and 4.6.0 to 4.6.7. Limited details are available on potential exploits or mitigations. Defenders should verify Wireshark version usage, review official advisories, and monitor for potential patches or mitigations. The CVE record was published on 2026-08-19T23:16:20.243Z and has not been modified since then.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.