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Cisco Warns of Active Exploitation of Critical ISE Flaw
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Fusion42 · 17 September 2026 · Fusion42 review
Cisco has disclosed active exploitation of a critical vulnerability in its Identity Services Engine (ISE) that allows attackers to bypass web management interfaces and gain root command execution. Customers and US Federal agencies are urged to apply urgent patches as no full workaround exists, with network monitoring also recommended to detect exploitation signs.
This Wire brief sits within Fusion42's coverage of Cybersecurity, and 3 sources have reported it.
◆ ◆ The Wire takeaway
US agencies now must patch Cisco ISE immediately, forcing founders in network security to prioritise rapid responses and client advisories. Your window to protect clients and differentiate your security posture just narrowed sharply.
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3 sources · 17 Sep 2026
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