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Revenge of the SD-WAN: Exploring and Exploiting Yet Another Critical Cisco SD-WAN Vulnerability (CVE-2026-76504)

Cisco published CVE-2026-76504, a critical authentication bypass in Catalyst SD-WAN Manager. Landon Rice at VulnCheck showed that a single percent-encoded POST to /%6a_security_check plus a reserved Viptela username mints an admin JSESSIONID, because getRequestURI()…

Revenge of the SD-WAN: Exploring and Exploiting Yet Another Critical Cisco SD-WAN Vulnerability (CVE-2026-76504)

0x01 // Recent research

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