Input validation error in Wireshark - #VU142309
Published: August 13, 2026
Vulnerability identifier: #VU142309
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in the ESS protocol dissector when parsing malformed packets or packet capture files. A remote attacker can inject a malformed packet onto the wire or trick the victim into opening a malformed packet capture file to cause a denial of service.
User interaction is required when exploitation relies on opening a crafted packet capture file.
Affected software
Wireshark
Remediation
Install security update from vendor's website.
Wireshark - addressed in versions 4.4.18, 4.6.8