Wire · regulatory
Cisco hit by max severity zero-day exploit targeting Identity Services Engine, so it's time to patch up
◆ Sectors
CybersecurityIdentity & AccessSecurity Infrastructure
◆ Geography
United States
◆ Source
◆ Verified
Fusion42 · 17 September 2026 · Fusion42 review
A critical zero-day vulnerability has been discovered in Cisco's Identity Services Engine, requiring urgent patching to prevent exploitation.
This Wire brief sits within Fusion42's coverage of Cybersecurity, Identity & Access and Security Infrastructure.
◆ ◆ The Wire takeaway
Your security infrastructure is vulnerable without immediate patching. Cisco customers must update now or face active exploitation risks.
◆ Coverage
1 source · 17 Sep 2026
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◆ Topics
CybersecurityIdentity & AccessSecurity Infrastructureciscozero-daysecurity-patchvulnerabilitycybersecurity