Cisco warns of actively exploited email gateway flaw
Cisco has confirmed a critical vulnerability in its Secure Email Gateway is being exploited. The flaw, identified as CVE-2026-76461, allows remote attackers to run commands with root privileges by sending crafted emails. The issue affects both physical and virtual gateway devices running certain versions of AsyncOS, but not other Cisco products. Cisco has released patches and urged users to upgrade, as there are no workarounds.
- Patches released for affected AsyncOS versions
- No workaround except updating software
- Scale of attacks not disclosed by Cisco
- U.S. agencies required to patch by September 17
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