
CISA Elevates Cisco SD-WAN Vulnerability CVE-2026-76504 to KEV Catalog After Active Exploitation
CISA has added CVE-2026-76504, a Cisco Catalyst SD-WAN Manager hex encoding vulnerability, to its Known Exploited Vulnerabilities catalog following evidence of active exploitation. This vulnerability affects Cisco's SD-WAN management infrastructure and represents a significant risk to federal enterprises and organizations using Cisco's SD-WAN solutions. The addition to the KEV catalog requires federal agencies to prioritize rapid remediation under Binding Operational Directive 26-04, which establishes risk-based vulnerability management requirements for publicly exposed assets that could grant total system control post-exploitation. This incident highlights the ongoing targeting of network infrastructure management systems, particularly SD-WAN platforms that have become critical to hybrid and multi-cloud connectivity strategies as organizations expand their digital footprints.
Kill Chain









