The Bottom Line: Cisco firewall management is being actively attacked through a backdoor that enables direct administrator access.
Cisco warns of a backdoor in its firewall management software being actively exploited by attackers. The vulnerability enables unauthorized access to critical network components.
Cisco has confirmed a critical security flaw in its firewall management software. A backdoor allows attackers to access affected systems with administrative rights. The vendor reports active exploits in the wild.
The security vulnerability lies in Cisco’s firewall infrastructure management components. Through the backdoor, attackers can obtain access to encoded credentials and misuse them for authentication. This jeopardizes control over network perimeters and security policies.
CISOs should immediately inventory affected firewall management systems and examine them for signs of compromise. Cisco is expected to release a patch; until then, network segmentation and strengthened access controls for management interfaces are recommended.
Source: www.golem.de · Published July 30, 2026
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