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

The US Cybersecurity and Infrastructure Security Agency has added a high-severity vulnerability in Microsoft SharePoint Server to its list of known exploited vulnerabilities. This flaw allows for remote code execution due to the deserialization of untrusted data and has a severity score of 8.8. There is evidence that this vulnerability is being actively exploited. The vulnerability is related to Microsoft SharePoint Server and has been assigned an identifier. It is a significant issue that can be exploited remotely. Active exploitation of the vulnerability has been detected, prompting its addition to the catalog.