Improperly Controlled Sequential Memory Allocation in Wireshark - CVE-2026-6533
Published: April 30, 2026
Vulnerability identifier: #VU128556
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-6533
CWE-ID: CWE-1325
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Wireshark.org
Affected software:
Wireshark
Wireshark
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improperly controlled sequential memory allocation within Dissection engine zlib decompression. A remote attacker can trick a victim to open a specially crafted packet trace file and perform a denial of service (DoS) attack.
How to mitigate CVE-2026-6533
Install updates from vendor's website.