Denial of Service Vulnerability in Wireshark C12.22 Protocol Dissector
CVE-2026-76886

8.1HIGH

Key Information:

Vendor

Wireshark
Status
Wireshark
Vendor
CVE Published:
19 August 2026

What is CVE-2026-76886?

An issue in the C12.22 protocol dissector of Wireshark versions 4.6.0 through 4.6.7 and 4.4.0 through 4.4.18 can lead to a crash, resulting in denial of service conditions. This vulnerability may be exploited by sending specially crafted packets, causing the application to terminate unexpectedly. It is essential to keep your software up to date to mitigate the risks associated with this issue.

Affected Version(s)

Wireshark 4.6.0 < 4.6.8

Wireshark 4.4.0 < 4.4.18

References

https://www.wireshark.org/security/wnpa-sec-2026-75.html
https://gitlab.com/wireshark/wireshark/-/work_items/21439

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

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