Fresh SharePoint Vulnerability Exploited Soon After Disclosure
The critical-severity security defect allows remote, authenticated attackers to execute arbitrary code on the server. The post Fresh SharePoint Vulnerability Exploited Soon After Disclosure appeared first on SecurityWeek.
Threat actors have begun exploiting a fresh critical-severity remote code execution (RCE) vulnerability in Microsoft SharePoint, the US cybersecurity agency CISA warns.
Tracked as CVE-2026-58644 (CVSS score of 9.8) and fixed as part of Microsoft’s July 2026 Patch Tuesday updates, the flaw is described as a deserialization of untrusted data issue.
“In a network-based attack, an attacker authenticated as at least a Site Owner could write arbitrary code to inject and execute code remotely on the SharePoint Server,” Microsoft explains.
Source: https://www.securityweek.com/fresh-sharepoint-vulnerability-exploited-soon-after-disclosure/
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