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PatchSiren cyber security CVE debrief

CVE-2026-76918 Wireshark Foundation CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-19T23:16:20.487Z and has not been modified since then. The NVD entry is currently Analyzed. This vulnerability affects Wireshark versions 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18, causing a crash in the SSH protocol dissector due to improper handling of certain protocol packets, potentially leading to a denial of service condition classified as CWE-122. Network administrators, security teams, and IT professionals responsible for managing Wireshark installations should be aware of this vulnerability and take necessary actions to mitigate the risk. Evidence is based on official CVE and NVD records.

Vendor
Wireshark Foundation
Product
Wireshark
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-19
Original CVE updated
2026-08-31
Advisory published
2026-08-19
Advisory updated
2026-08-31

Who should care

Network administrators, security teams, and IT professionals responsible for managing Wireshark installations should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The CVE-2026-76918 vulnerability affects Wireshark versions 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18, causing a crash in the SSH protocol dissector due to improper handling of certain protocol packets. This could lead to a denial of service condition. The vulnerability is classified as CWE-122.

Defensive priority

Medium-priority defensive actions are recommended due to the potential for denial of service attacks.

Recommended defensive actions

  • Inventory and verify Wireshark installations to identify potentially vulnerable versions.
  • Apply vendor patches or updates to Wireshark installations to address the vulnerability.
  • Implement compensating controls, such as monitoring and exception tracking, to detect potential exploitation attempts.
  • Review and update incident response plans to address potential denial of service attacks.

Evidence notes

The CVE-2026-76918 vulnerability affects Wireshark versions 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18, causing a crash in the SSH protocol dissector, which could lead to a denial of service. Evidence is based on official CVE and NVD records.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-76918 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-76918

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-76918 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-76918

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.