CTI · corroborated · 2026-09-16

Cisco Patches Critical Zero-Day in Secure Email Gateway (CVE-2026-76461)

Full story & timeline

MITRE ATT&CK

• T1190 Exploit Public-Facing Application Initial Access
• T1059 Command and Scripting Interpreter Execution

Indicators

Observables tied to this case, from the curated feed. raw sidecar

• cybersecurefox.com domain · active · corroborated

Detections

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

References

• https://socprime.com
• https://threatnoir.com
• https://dev.to