CVE-2026-76888 Heap-based Buffer Overflow in Wireshark
A heap-based buffer overflow in the RDP dissector allows attackers to cause a denial of service in Wireshark.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-76888?
CVE-2026-76888 is a low-severity memory corruption vulnerability in Wireshark Wireshark, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
RDP 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-122
Which versions are affected by CVE-2026-76888?
It affects 1 product.
Products include Wireshark Wireshark.
How do I fix CVE-2026-76888?
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-2026-76888 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76888 exists.
Other vulnerabilities in Wireshark Wireshark
Sources
Also known as AZL-96818, DEBIAN-CVE-2026-76888, GHSA-744r-mg5c-qh5x, MINI-45wp-mqmp-68w3, UBUNTU-CVE-2026-76888.