Security
New NatJack Attacks Hijack TCP Sessions and Spoof DNS by Manipulating NAT Tables
The Hacker News·August 7, 2026·1 min read
Security researcher Malcolm Stagg disclosed a new attack class called NatJack at Black Hat USA 2026. NatJack manipulates network address translation connection state to hijack active TCP sessions, spoof DNS responses, expose mapped ports, and exhaust NAT tables. The research found affected behavior across independently developed implementations, including Windows and other systems.
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