CVE-2026-45659
CISA warns admins to patch actively exploited SharePoint flaws
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) warned Tuesday that attackers are actively exploiting three vulnerabilities to hack Internet-exposed on-premises SharePoint Server instances. These security flaws (tracked as CVE-2026-32201, CVE-2026-45659, and c) affect all supported self-hosted SharePoint Server versions, including SharePoint Server Subscription Edition (the latest on-premises version, which uses a “continuous update” model). […]
CISA: Microsoft SharePoint RCE flaw now actively exploited
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) warned on Wednesday that attackers have begun exploiting a high-severity Microsoft SharePoint remote code execution vulnerability. Tracked as CVE-2026-45659, this security flaw stems from a deserialization of untrusted data weakness, and it allows attackers with low privileges to execute arbitrary code on unpatched SharePoint servers in low-complexity attacks […]