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Hackers Exploit Cisco Bug, CISA Urges Urgent Patches

2/27/2026

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Story summary
  • Cisco reports hackers exploited a bug in Catalyst SD-WAN products for at least three years, enabling remote access to networks.
  • The Cybersecurity and Infrastructure Security Agency (CISA) has ordered federal agencies to patch by February 27 and investigate potential compromises.
  • The attacks are linked to the threat actor UAT-8616, signaling a trend of targeting edge devices.
  • CISA's guidance aims to mitigate risks as operational challenges persist amid a government shutdown.