CYBER DELTA FORCESearch

Cisco patches Secure Email Gateway zero-day exploited in attacks

Cisco warned customers to patch a critical Secure Email Gateway zero-day security flaw that threat actors have been exploiting in attacks.

CDF News DeskBleepingComputer15 Sept 2026, 1:01 pm
CDF REPORT

Cisco warned customers to patch a critical Secure Email Gateway zero-day security flaw that threat actors have been exploiting in attacks.

What to watch next

Watch for revised fixed-version guidance and confirmation that mitigations are holding in affected environments.

What remains unknown

The available reporting does not establish whether the issue is being actively exploited in the wild.

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