
Threat Actors Target Unpatched Cisco AsyncOS Zero-Day
Threat actors are exploiting an unpatched zero-day vulnerability in Cisco AsyncOS software.

Threat actors are exploiting an unpatched zero-day vulnerability in Cisco AsyncOS software.
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Threat Actors Target Unpatched Cisco AsyncOS Zero-Day
December 17, 2025 | 2 min read
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The Enduring Hacker Legacy of Heat
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Amazon researchers highlighted a “tactical pivot” by Russian GRU hackers who have been moving away from zero-day and N-day exploitation.
It was 30 years ago this week that Michael Mann’s masterpiece Heat hit theaters like a semi T-boning an armored car. In addition to being a masterful heist movie and insightful depiction of the toll that obsession can exact, Heat is also a criminally underrated hacker movie.
The vulnerability was disclosed publicly on Dec. 3 and researchers and threat intelligence teams immediately began seeing opportunistic and targeted exploitation attempts.
A year after Salt Typhoon’s telecom hack, private and public sector officials discussed next steps.
Read More Government, Private Sector Officials Mull Telecom Security Woes
All developers using React Server Components are urged to upgrade immediately, and some apps that don’t include React Server Function endpoints could be vulnerable, as well.
Read More Critical Flaw CVE-2025-55182 Affects React Server Components
The victims in Israel span multiple industries, including technology, engineering, manufacturing, local government, and education.