On September 21, 2026, CISA added CVE-2026-7273, a stack-based buffer overflow in the CGI of Zyxel GS1900 switches, to its KEV catalog after confirming active exploitation. Lock down the management interface, apply Zyxel’s fix before September 24, and hunt for signs of compromise on exposed devices.

Gzip 1.15, released September 20, 2026, ships 119 commits of fixes including a buffer overflow and uninitialized memory access present since the early 1990s. Update gzip and treat archive decompression as untrusted input.