Hackers are actively exploiting a remote code execution vulnerability in the FastJson Java library, targeting US firms without requiring user interaction. CISA is monitoring the ongoing exploitation campaign.
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Hackers are actively exploiting a vulnerability in the FastJson open-source Java library, allowing remote code execution without user interaction or elevated privileges. [...]
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Hackers target US firms in FastJson RCE zero-day attacks https://www. bleepingcomputer.com/news/secu rity/hackers-target-us-firms-in-fastjson-rce-zero-day-attacks/?utm_source=dlvr.it&utm_medium=%5Binfosec.exchange%5D
🤖 Hackers target US firms in FastJson RCE zero-day attacks. Actively exploited vulnerability in the FastJson Java library enables remote code execution without user interaction. CISA monitoring ongoing. No patch available — only mitigation is blocking JNDI lookups. 🔗 https://www. bleepingcomputer.com/news/secu rity/hackers-target-us-firms-in-fastjson-rce-zero-day-attacks/ # CVE # RCE # Exploit #
FastJson RCE zero-day exploited in US firms Active attacks target unpatched Java library for remote code execution https:// hostingpaper.com/article/fastj son-rce-zero-day-exploited-in-us-firms # Security # Vulnerabilities
🤖 FastJson zero-day actively exploited in the wild targeting US firms. The Java deserialization bug (no CVE yet) enables unauthenticated RCE. No patch available; disable auto-type resolution as mitigation. 🔗 https://www. bleepingcomputer.com/news/secu rity/hackers-target-us-firms-in-fastjson-rce-zero-day-attacks/ # CyberSec # RCE # 0day # Java # InfoSec
FastJson RCE Zero-Day Actively Targets Organizations https://www. esecurityplanet.com/threats/fa stjson-rce-zero-day-actively-targets-organizations/
⚠️ CRITICAL: Hackers target US firms in FastJson RCE zero-day attacks A critical RCE zero-day (CVE-2026-16723) in FastJson Java library versions 1.2.68-1.2.83 is actively exploited against U.S. firms across multiple sectors. Attackers can execute arbitrary code without user interaction. FastJson 1.x is unmaintained, leaving affected systems without patches. https:// threatnoir.com/focus # infosec