PAC File Security

Noun · Security & Infosec

Definitions

  1. The protection of proxy auto-configuration files and the trust model around how browsers or systems retrieve and execute them. PAC file security matters because a malicious or tampered configuration can silently redirect traffic, weaken inspection, or enable credential theft through proxy manipulation.

    In plain English: Security for the files that tell devices which proxy settings to use.

    Example: "The compromise path began with PAC file security failure when laptops accepted a spoofed proxy config from an untrusted network."

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