China’s Cyber Shenanigans: Ivanti Vulnerability Exploited!
A Chinese state threat actor, UNC5221, is exploiting a critical Ivanti vulnerability, CVE-2025-22457, to achieve remote code execution. Mandiant researchers have observed the deployment of new malware families by the group. Ivanti and Mandiant urge customers to apply patches to prevent significant post-compromise activities.

Hot Take:
Who knew that a buffer overflow flaw would turn into a Chinese buffet for hackers? The Ivanti vulnerability is like a piñata filled with code execution candy, and the Chinese state threat actors seem to be taking a big swing at it. If you’re running outdated Ivanti software, it might be time to patch up or these hackers will turn your system into their new favorite playground!
Key Points:
- Chinese state threat actors are exploiting a critical Ivanti vulnerability, CVE-2025-22457.
- Mandiant researchers observed deployment of two new malware families: Trailblaze and Brushfire.
- The vulnerability was initially thought to be low-risk but has a critical CVSS score of 9.0.
- Active exploitation has been ongoing since mid-March 2025.
- Mandiant advises all users to patch their systems ASAP to avoid becoming the next target.
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