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CVE-2026-76504
Trends
- 1Cisco zero-day in Catalyst SD-WAN Manager exploited via single encoded character●Discover how a single encoded character exploited a critical Cisco zero-day vulnerability in the Catalyst SD-WAN Manager
A critical zero-day vulnerability, tracked as CVE-2026-76504, in Cisco's Catalyst SD-WAN Manager reportedly allowed attackers to gain administrative access by sending a single encoded character. Security commentators are highlighting how minimal the exploit requirement was, raising concerns about unpatched SD-WAN deployments and urging administrators to apply fixes and review exposure.
- 2Cisco SD-WAN Manager flaw actively exploited, admins urged to patch●Attackers exploit CVE-2026-76504, a 9.8 authentication bypass in Cisco SD-WAN Manager that grants admin API access. Patc
Attackers are exploiting CVE-2026-76504, a critical authentication bypass vulnerability in Cisco SD-WAN Manager with a severity score of 9.8. The flaw allows unauthenticated access to the administrative API, potentially handing attackers full control of affected systems. Security sources say it is being actively exploited and are urging organisations to apply Cisco's patch immediately.
- 3Cisco Patches Actively Exploited Zero-Day in SD-WAN Manager●Cisco Patches Actively Exploited Zero-Day in Catalyst SD-WAN Manager Cisco released security updates for a zero-day vuln
Cisco has released security updates for Catalyst SD-WAN Manager to fix a zero-day vulnerability, tracked as CVE-2026-76504, that attackers are actively exploiting in the wild. The flaw allows unauthenticated remote attackers to gain administrator privileges on affected systems. Administrators are urged to apply the patches promptly, as exploitation is already underway and unpatched SD-WAN management consoles could give attackers broad control over enterprise networks.
- 4Critical Cisco SD-WAN Manager Vulnerability Under Active Exploitation●(rapid7.com) Critical API Authentication Bypass in Cisco Catalyst SD-WAN Manager (CVE-2026-76504) Under Active Exploitat
Rapid7 reports a critical API authentication bypass vulnerability in Cisco Catalyst SD-WAN Manager, tracked as CVE-2026-76504, that is being actively exploited in the wild. The flaw lets attackers bypass authentication on the network management platform, prompting security teams to review patching and mitigation guidance for affected deployments.