Zyxel GS1900 network switches that received the vendor's earlier fix for an actively exploited flaw are still open to the exploit attackers used, researchers at Binarly found.

The exploit lets anyone who can reach a switch's web management interface run commands on it without logging in. Zyxel has released new firmware for 10 GS1900 models that closes the hole.

The earlier fix is the 2.90



Source: TheHackerNews
Source Link: https://thehackernews.com/2026/11/zyxel-gs1900-patch-fails-to-block-zero.html