CVE-2026-5402 HIGH

CVE-2026-5402: Heap-based Buffer Overflow in Wireshark

Vendor Wireshark Foundation
Product Wireshark
Weakness CWE-122
Published April 30, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution

Key dates

02Disclosure timeline

April 30, 2026 CVE published
June 30, 2026 Record updated