Bottom line: A PoC exploit for a critical SharePoint vulnerability published by Rapid7 is already being actively exploited by attackers.
Shortly after security firm Rapid7 published a proof-of-concept exploit on Tuesday for a critical vulnerability in Microsoft SharePoint, attackers are already actively deploying it in the wild. Affected organizations with exposed SharePoint servers must expect immediate attack attempts.
Rapid7 published a proof-of-concept exploit on Tuesday for a vulnerability in Microsoft SharePoint classified as critical. According to reports, attackers are already leveraging this PoC code to attack vulnerable SharePoint installations. Further technical details on the specific vulnerability, such as the CVE identifier or affected version levels, were not available at the time of reporting.
For CISOs, the availability of a public PoC exploit significantly shortens the time window until mass exploitation. SharePoint servers are frequently central components of document and collaboration infrastructure and are often accessible from the internet, making them an attractive target for initial access, data exfiltration, or as a stepping stone for lateral movement within the network.
Security teams should promptly review which SharePoint instances are exposed within their own organization and at service providers, apply available patches from Microsoft in a timely manner, and monitor logs for suspicious access patterns to SharePoint endpoints. Until an official patch is confirmed, it is also advisable to review compensating measures such as network segmentation or restricting external access to affected systems.
Source: www.bleepingcomputer.com · Published August 12, 2026
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