Broadcom Wi-Fi Chipset Flaw Allows Hackers to Disrupt Networks

According to SecurityWeek, a vulnerability found by researchers at Black Duck affects Broadcom Wi‑Fi chipsets and was first identified in Asus routers, with the issue extending to all devices using the affected chipset. The flaw can be exploited by an unauthenticated attacker using a single specially crafted Wi‑Fi frame to disable a router’s 5 GHz network, disconnect active clients, and prevent reconnections, potentially disrupting networks in organisations with always‑on wireless access.

The attack bypasses WPA2 and WPA3 protections and can be repeated indefinitely, though Ethernet connections and the 2.4 GHz network are not affected. Broadcom has been notified and has provided a patch to device manufacturers that use its chipset, while Asus has released firmware updates for its affected products. SecurityWeek notes that the affected Broadcom chipset is widely used across enterprise, consumer, and embedded routers, and Black Duck has not published technical details to prevent exploitation. Eduard Kovacs authored the piece, published on 13 January 2026 at 9:10 AM ET.