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Cisco patches actively exploited email gateway zero-day (CVE-2026-76461)
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Fusion42 · 15 September 2026 · Fusion42 review
Cisco patched a zero-day SQL injection vulnerability (CVE-2026-76461) actively exploited in its Secure Email Gateway appliances, affecting both on-premises and cloud versions. US CISA ordered federal agencies to remediate by September 17, highlighting the critical risk of root-level compromise via crafted emails without user interaction.
This Wire brief sits within Fusion42's coverage of Cybersecurity, and 3 sources have reported it.
◆ ◆ The Wire takeaway
You must act fast to update any Cisco Secure Email Gateway appliances or cloud services to avoid root-level breaches that can erase evidence. Security teams have a tight remediation deadline from US government authorities that makes this a immediate compliance and risk priority.
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3 sources · 15 Sep 2026
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