What’s Vulnerable › Vulnerabilities

CVE-2026-15170: Heap-based Buffer Overflow in Wireshark

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-07-08 · updated 2026-10-25
• Weakness: CWE-122

Description

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 products

• Wireshark Foundation Wireshark: from 4.4.0 before 4.4.17; from 4.6.0 before 4.6.7 — fixed in 4.4.17, 4.6.7

How to fix

Upgrade to a fixed version: Wireshark Foundation Wireshark 4.4.17, 4.6.7. Check the vendor advisory for mitigations.

References

• https://gitlab.com/wireshark/wireshark/-/work_items/21397
• https://www.wireshark.org/security/wnpa-sec-2026-58.html
• https://gitlab.com/wireshark/wireshark/-/work_items/21397

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