The Wireshark Foundation has released Wireshark 4.6.6, delivering an important round of security and stability updates that address a serious Dissector Crash vulnerability tied to the ROHC protocol parser, along with a separate global-buffer-overflow flaw affecting MACsec traffic analysis. The release focuses heavily on improving reliability for users handling untrusted packet captures and production monitoring environments. 

At the center of the update is a security issue identified as wnpa-sec-2026-51, tracked internally as Issue 21243. The flaw involved Wireshark’s ROHC (Robust Header Compression) dissector, the component responsible for decoding compressed IP packet headers during netwo...