STRATQUAD
CYBER THREAT INTELLIGENCE BRIEF
Daily Brief · 21 July 2026 · 24h windowRISKLOW
StratQuad CTI Daily Brief, 21 July 2026
Compiled from 52 monitored sources · 2476 articles reviewed

Today’s Briefing

NHS Digital has issued a high severity alert for CVE-2026-58644, a critical unauthenticated remote code execution vulnerability in Microsoft SharePoint Server. Separately, F5 has published an advisory for CVE-2026-42533 in NGINX and NGINX Plus, which could allow unauthenticated remote attackers to cause denial of service or potentially achieve remote code execution.

Top Stories

  1. CC-4816 - Exploitation of Critical Vulnerability in Microsoft SharePoint Server
  2. CC-4817 - F5 Releases Security Advisory for Critical Vulnerability in NGINX and NGINX Plus
  3. Healthcare giant Abbott probes two cyber incidents amid extortion claims

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