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Cisco finally fixes AsyncOS zero-day exploited since November

  • Sergiu Gatlan--BleepingComputer
  • published date: 2026-01-16 09:20:58 UTC

​Cisco finally patched a maximum-severity AsyncOS zero-day exploited in attacks targeting Secure Email Gateway (SEG) appliances since November 2025. [...]

​Cisco has finally patched a maximum-severity Cisco AsyncOS zero-day exploited in attacks against Secure Email Gateway (SEG) and Secure Email and Web Manager (SEWM) appliances since November 2025. A… [+2804 chars]

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