CTI · reviewed · 2026-10-02

Cisco SD-WAN Manager auth bypass CVE-2026-76504 (CVSS 9.8) under exploitation warning

Full story & timeline

MITRE ATT&CK

• T1190 Exploit Public-Facing Application Initial Access

Indicators

No curated indicators tied to this case.

Detections

No detection content yet — case analysis did not yield signal-specific telemetry. Check back after the next daily CTI pass.

References

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-webauth-xr8beuuU
• https://www.bleepingcomputer.com/news/security/cisco-warns-of-new-sd-wan-authentication-bypass-zero-day-exploited-in-attacks/
• https://www.rapid7.com/blog/post/etr-critical-cisco-catalyst-sd-wan-manager-api-authentication-bypass-exploited-in-the-wild-cve-2026-76504
• https://horizon3.ai/attack-research/vulnerabilities/cve-2026-76504/