Paper/Archive/CVE-2026-76886

CVE-2026-76886

Wireshark Foundation Wireshark — Heap-based Buffer Overflow in Wireshark

EPSS 0.4%public exploit CVSS 9.8

critical.is priorityof 100

46

CVSS 9.8 (NVD)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 32.2.322 × 206.4 Exploit: SSVC poc+1010.0 SSVC exploitation: poc+100.0

Description · from the CVE record

C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

Affected

ProductAffectedFixed inSource

Wireshark4.6.0 – < 4.6.84.6.8CNA

Wireshark4.4.0 – < 4.4.184.4.18CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

GitLab (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

refwireshark.org/security/wnpa-sec-2026-75.html refgitlab.com/wireshark/wireshark/-/work_items/21439 exploitgitlab.com/wireshark/wireshark/-/work_items/21446