CVE-2026-15170: Heap-based Buffer Overflow in Wireshark
Published Jul 8, 2026
·Updated
Z39.50 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·08:50 PM
Data Sourced
via MITRE·08:50 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·09:16 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-15170?
The severity of CVE-2026-15170 is classified as medium with a CVSS score of 5.5.
2
How does CVE-2026-15170 affect Wireshark?
CVE-2026-15170 causes a heap-based buffer overflow in the Z39.50 protocol dissector, which can lead to a denial of service.
3
Which versions of Wireshark are affected by CVE-2026-15170?
Wireshark versions 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 are affected by CVE-2026-15170.
4
How do I fix CVE-2026-15170?
To fix CVE-2026-15170, users should upgrade to the latest version of Wireshark that addresses the vulnerability.
5
What type of vulnerability is CVE-2026-15170?
CVE-2026-15170 is categorized as a heap-based buffer overflow vulnerability.