CVE-2026-76881 NULL Pointer Dereference in Wireshark
A NULL pointer dereference in the CMS protocol dissector allows attackers to cause a denial of service in Wireshark.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-76881?
CVE-2026-76881 is a medium-severity vulnerability in Wireshark Wireshark, published on 19 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
CMS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Weakness: CWE-476
Which versions are affected by CVE-2026-76881?
It affects 1 product.
Products include Wireshark Wireshark.
How do I fix CVE-2026-76881?
Upgrade to a fixed version.
Is CVE-2026-76881 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76881 exists.
Other vulnerabilities in Wireshark Wireshark
Sources
Also known as AZL-96927, DEBIAN-CVE-2026-76881, GHSA-qqq4-v263-8jqw, MINI-6wvc-g5mq-mm56, UBUNTU-CVE-2026-76881.