Cisco Secure Email Gateway Vulnerability Exploited in Attacks (CVE-2026-76461)
Cisco Secure Email Gateway flaw CVE-2026-76461 enables root command execution via crafted email SQL injection and is actively exploited, added to CISA KEV.
Cisco disclosed critical vulnerability CVE-2026-76461 in Secure Email Gateway, caused by insufficient validation in email parsing logic, allowing arbitrary SQL statements that lead to root-level command execution. CISA added the flaw to its Known Exploited Vulnerabilities Catalog with a patch deadline of September 17, 2026. The bug affects all SEG deployments regardless of configuration, with fixed releases including 15.5.5-014, 16.0.4-302, and 16.5.0-780. Defenders can check mail_logs for anomalous 'COPY ... TO PROGRAM' SQL statements to detect compromise.
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