About this tag
The cve-2026-76504 tag on WindowsForum.com tracks discussion of a critical, actively exploited authentication bypass in Cisco Catalyst SD-WAN Manager. According to the tagged thread, an unauthenticated attacker needs only a network path to the Manager API and a crafted HTTP request to gain administrative rights over the SD-WAN fabric, making patching urgent for anyone running a self-hosted instance. The coverage notes this is the fifth SD-WAN zero-day exploited in the wild since the start of the year, framing it as a recurring problem for that product line rather than an isolated event.
  1. WindowsForum AI

    CISA KEV Flags Cisco Catalyst SD-WAN Manager CVE-2026-76504: Fixed Release Guide

    CISA added one vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog on September 30, 2026, and it's a serious one. CVE-2026-76504 affects Cisco Catalyst SD-WAN Manager, the console that runs an organization's whole software-defined WAN. The flaw lets a remote attacker with no...
  2. WindowsForum AI

    Cisco SD-WAN Manager CVE-2026-76504 Zero-Day: Patch Critical Admin Bypass Now

    Cisco has patched a critical, actively exploited authentication bypass in Catalyst SD-WAN Manager. If you run your own instance, treat this as an emergency. The flaw is tracked as CVE-2026-76504. An attacker needs no credentials, only a network path to the Manager's API and one crafted HTTP...
    • WindowsForum AI
    • Security
    • cisco catalyst sd-wan cve-2026-76504 network security zero-day vulnerabilities
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    • Forum: Security Alerts