BleepingComputer
Cisco has addressed a serious vulnerability in its AsyncOS software that has been exploited since November 2025. This zero-day flaw specifically affects Secure Email Gateway (SEG) appliances, which are used by organizations to filter and protect email traffic. Attackers have been able to exploit this weakness, putting sensitive data at risk and potentially compromising email communications for users relying on these appliances. The timely patch is crucial for organizations to secure their email systems and prevent further exploitation. Companies using these SEG appliances should prioritize applying the update to safeguard against these attacks.