CVE-2026-45659 – CyberSecurityBoard

Critical CVEs

Critical SharePoint RCE CVE-2026-50522 Under Active Exploitation After Public PoC

A critical remote code execution vulnerability in Microsoft SharePoint Server, CVE-2026-50522 (CVSS 9.8), is being actively exploited in the wild following the…

active exploitation CISA CVE-2026-32201 CVE-2026-45659

July 21, 2026

Critical CVEs

CISA Adds Exploited SharePoint RCE Zero-Day CVE-2026-58644 to KEV

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a critical remote code execution vulnerability in Microsoft SharePoint Server, tracked as…

CISA CISA KEV CVE-2026-25089 CVE-2026-32201

July 17, 2026

Critical CVEs

Researcher Releases Windows Zero-Day PoC LegacyHive Hours After July 2026 Patch Tuesday

Security researcher Chaotic Eclipse (aka Nightmare-Eclipse) has released a proof-of-concept (PoC) exploit called LegacyHive, targeting a Windows User Profile Service (ProfSvc) arbitrary…

Action1 Active Directory Federation Services active exploitation authentication bypass

July 15, 2026

Critical CVEs

SharePoint RCE CVE-2026-45659 Added to CISA KEV After Active Exploitation

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a high-severity remote code execution vulnerability, CVE-2026-45659 (CVSS 8.8), affecting Microsoft SharePoint…

active exploitation CISA KEV Cloudflare CVE-2025-11371

July 2, 2026

Critical CVEs

CVE-2026-45659 — Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability

Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing…

CISA KEV CVE-2026-45659 Microsoft Ransomware

July 1, 2026