{
  "id": 6215768,
  "title": "PoisonedRefresh embeds memory-only shells in F5 BIG-IP",
  "url": "https://urgent.news/2026/09/08/poisonedrefresh-embeds-memory-only-shells-in-f5-big-ip",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-08T02:22:55.000Z",
  "source": {
    "name": "Arabian Post",
    "slug": "arabian-post",
    "url": "https://thearabianpost.com/poisonedrefresh-embeds-memory-only-shells-in-f5-big-ip/"
  },
  "original_language": "en",
  "account": null,
  "summary": "Security researchers have detailed a stealthy Linux implant, dubbed PoisonedRefresh, that backdoors compromised F5 BIG-IP Access Policy Manager systems by injecting PHP web shells directly into server memory while leaving legitimate files on disk unchanged. The malware has been associated with exploitation of CVE-2025-53521, a critical unauthenticated remote code execution vulnerability in BIG-IP…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}