CVE-2026-15166: Stack-based Buffer Overflow in Wireshark
Published Jul 8, 2026
·Updated
IEEE 802.11 protocol dissector crash in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows denial of service
Affected Software
3 affected components
Wireshark Wireshark>=4.6.0<=4.6.6, >=4.4.0<=4.4.16
Wireshark Wireshark>=4.4.0<4.4.17
Wireshark Wireshark>=4.6.0<4.6.7
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Wiresharkto a version that resolves this vulnerability.Fixed in 4.6.7
Event History
Jul 8, 2026
CVE Published
via MITRE·08:55 PM
Data Sourced
via MITRE·08:55 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·09:16 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-15166?
CVE-2026-15166 has a severity rating of medium, with a score of 5.5.
2
What causes the vulnerability CVE-2026-15166?
CVE-2026-15166 is caused by a stack-based buffer overflow in the IEEE 802.11 protocol dissector in specific versions of Wireshark.
3
What is the impact of CVE-2026-15166?
The impact of CVE-2026-15166 is a denial of service, causing a crash in the affected versions of Wireshark.
4
How can CVE-2026-15166 be mitigated?
To mitigate CVE-2026-15166, users should upgrade to the patched versions of Wireshark: 4.6.7 or 4.4.17 and later.
5
Which versions of Wireshark are affected by CVE-2026-15166?
CVE-2026-15166 affects Wireshark versions 4.6.0 to 4.6.6 and versions 4.4.0 to 4.4.16.