🔐 CVE Alert

CVE-2026-76886

HIGH 8.1

Heap-based Buffer Overflow in Wireshark

CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th

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

CWE CWE-122
Vendor wireshark foundation
Product wireshark
Published Aug 19, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Affected Versions

Wireshark Foundation / Wireshark
4.6.0 < 4.6.8 4.4.0 < 4.4.18

References

NVD ↗ CVE.org ↗ EPSS Data ↗
wireshark.org: https://www.wireshark.org/security/wnpa-sec-2026-75.html gitlab.com: https://gitlab.com/wireshark/wireshark/-/work_items/21439

Credits

Aisle Research (Dmitrijs Trizna, Luigino Camastra, Ze Sheng (O2Lab & TAMU), Igor Morgenstern)