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What Is a Web Application Firewall and Do You Need One?

ID: 25fbeb6b-e263-536f-9d59-aca634ff4a28

STIX ID: report--25fbeb6b-e263-536f-9d59-aca634ff4a28

Feed Name: SecurityScorecard Blog

Date Published: 2025-06-10

Date Updated: 2026-04-29

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**Executive Summary:** This document provides an overview of Web Application Firewalls (WAFs), explaining their role in protecting application-layer traffic (e.g., SQL injection, XSS, RCE), differences between cloud/on-prem/host-based deployments, common limitations, and how WAFs complement supply-chain monitoring; it also promotes SecurityScorecard's SCDR product for third-party risk detection and is not an incident report.

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