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PHP2Shell plus Fragnesia: A dangerous new route from web server to root

Dream said attackers chained PHP2Shell with a Linux privilege flaw to breach 25 firewalls and reach internal networks in minutes.

  • On October 23, 2026, Chinese threat actors began exploiting PHP2Shell vulnerabilities against Palo Alto Networks firewalls, targeting two servers affiliated with the United States government.
  • Hackers used FOFA to identify about 19,000 firewalls, narrowing targets to 240 before compromising 24 by chaining PHP2Shell with Fragnesia, a privilege-escalation flaw enabling root access.
  • Cybersecurity firm Dream reported attackers executed 40 custom scripts using Claude Code and Chinese AI models DeepSeek and Kimi to facilitate the breach.
  • CISA ordered federal agencies to patch systems within three days as attackers tunneled into internal networks within hours, launching Active Directory campaigns.
  • Experts warn the window between vulnerability disclosure and exploitation is closing, as attackers scan for targets before technical details emerge, making patch management critical.
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Help Net Security broke the news on Thursday, October 29, 2026.
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