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Cisco warns of max severity ISE zero-day exploited in attacks
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Fusion42 · 17 September 2026 · Fusion42 review
Cisco warned of an actively exploited maximum severity zero-day vulnerability (CVE-2026-76460) in its Identity Services Engine (ISE) that allows remote attackers to bypass authentication, with no known workarounds, prompting urgent patch releases and federal patching mandates.
This Wire brief sits within Fusion42's coverage of Cybersecurity, and 3 sources have reported it.
◆ ◆ The Wire takeaway
Your network access controls just became a direct attack target with no workaround options. Apply Cisco's patches immediately or your systems remain vulnerable to stealth attackers gaining privileged access.
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3 sources · 17 Sep 2026
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