CVE-2026-76883 Heap-based Buffer Overflow in Wireshark
A heap-based buffer overflow in the Catapult DCT2000 file parser allows attackers to cause a denial of service via crafted files.
- 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-2026-76883?
CVE-2026-76883 is a medium-severity memory corruption 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
Catapult DCT2000 file parser crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Weakness: CWE-122
Which versions are affected by CVE-2026-76883?
It affects 1 product.
Products include Wireshark Wireshark.
How do I fix CVE-2026-76883?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-76883 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76883 exists.
Other vulnerabilities in Wireshark Wireshark
Sources
Also known as AZL-96827, DEBIAN-CVE-2026-76883, GHSA-qfrc-4462-rghv, MINI-gggx-jg6p-7mj8, UBUNTU-CVE-2026-76883.