SEH
Structured Exception Handler
A Windows error-handling mechanism that can be abused in exploits.
SEH is the Windows mechanism that dispatches exceptions to registered handler routines as a program runs. Attackers can overwrite the handler pointer on the stack during a buffer overflow so that triggering an exception redirects execution to their code, a technique known as SEH overwrite. Mitigations such as SafeSEH and SEHOP validate the handler chain, and the topic illustrates why memory safety protections matter when studying application attacks on the exam.
Looking SEH up is step one. Getting tested on it is step two.
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