Microsoft Patch Tuesday April 2026: 168 Vulnerabilities Fixed Including Actively Exploited SharePoint Zero-Day
Microsoft's April 2026 Patch Tuesday fixes a record 168 vulnerabilities, including an actively exploited SharePoint zero-day (CVE-2026-32201) and a publicly disclosed Microsoft Defender privilege escalation flaw. Security teams...
Critical Fortinet FortiClient EMS Zero-Day CVE-2026-35616 Exploited Before Official Patch Was Released
A critical SQL injection zero-day in Fortinet's FortiClient EMS (CVE-2026-35616) is being actively exploited in the wild. WatchTowr sensors detected attacks four days before Fortinet's advisory, with exploitation...
Windows Defender Triple Zero-Day: BlueHammer, RedSun, and UnDefend Actively Exploited in the Wild
Three critical zero-day vulnerabilities — BlueHammer (CVE-2026-33825), RedSun, and UnDefend — have been discovered in Windows Defender's remediation engine. All three allow local privilege escalation to SYSTEM level...
Three Windows Defender Zero-Days Exploited in the Wild: BlueHammer Patched, RedSun and UnDefend Still Unpatched
A security researcher dropped three Windows Defender zero-day exploits in 13 days — BlueHammer (CVE-2026-33825), RedSun, and UnDefend. All three are now confirmed active in live attacks, with...
Microsoft April 2026 Patch Tuesday: Actively Exploited SharePoint Zero-Day Among 167 Fixes
Microsoft's April 2026 Patch Tuesday patches 167 vulnerabilities including an actively exploited SharePoint Server zero-day (CVE-2026-32201) and a publicly disclosed Windows Defender race condition (CVE-2026-33825). Security teams should...
CVE-2026-39987: Marimo RCE Zero-Day Exploited Within 10 Hours of Disclosure — 662 Attacks Recorded
A critical unauthenticated RCE vulnerability in the Marimo Python notebook framework (CVE-2026-39987) was actively exploited just 10 hours after public disclosure. Sysdig recorded 662 exploit events over four...
Google Patches Actively Exploited Chrome Zero-Day CVE-2026-5281 — CISA Deadline Hits Today
Google has patched a high-severity use-after-free zero-day in Chrome's WebGPU implementation (CVE-2026-5281) that is actively exploited in the wild. CISA set a mandatory federal remediation deadline of April...
Critical Marimo Python Notebook Zero-Day (CVE-2026-39987) Exploited Within 10 Hours of Disclosure
A critical pre-authentication RCE vulnerability (CVE-2026-39987, CVSS 9.3) in the popular Marimo Python notebook platform was weaponised within 10 hours of public disclosure. Attackers are actively harvesting credentials,...