C-Kermit before 11.1.515 Heap Buffer Overflow via putsrv() Packet Decoding
Not on CISA's list of exploited flaws, and not in the news we track.
9.2of 10, critical
Reading the vendor advisory
Fix it in your code
Each opens with a short prompt that points at Global Hack Map's public runbook for CVE-2026-129126. Nothing runs until you send it.
C-Kermit before 11.1.515 contains a heap buffer overflow vulnerability in putsrv() in ckcfns.c that allows malicious peers to write past the srvcmd buffer by sending crafted packets. Attackers can use Kermit repeat-count compression in server command, GET, or file-header packets to write attacker-chosen bytes beyond the heap buffer on servers or receiving instances.
You are affected if
The fix