Cisco fixes exploited zero-day vulnerability in Catalyst SD-WAN
Cisco on Wednesday deployed urgent patches for a critical authentication bypass in Catalyst SD-WAN Manager that has been exploited in the wild. The flaw, tracked as CVE-2026-76504 (CVSS score 9.8), impacts the session-based API authentication mechanism and could allow remote, unauthenticated attackers to gain administrative access to a vulnerable system. “In September 2026, the Cisco … Read more