Act
active
Attackers exploit critical SharePoint vulnerability using public PoC
- Engineer — Act: Public PoC is live and attackers are already exploiting this critical SharePoint flaw — patch SharePoint on-prem deployments immediately and audit SharePoint ULS and IIS logs for anomalous authentication or anonymous access patterns from the PoC release date forward.
- SOC/IR — Act: Active in-the-wild exploitation means an immediate hunt is warranted — query SIEM for unusual SharePoint authentication events, abnormal REST/SOAP API calls, or unexpected file-access patterns since Rapid7’s PoC publication date, and tune alerts on SharePoint edge access.
- Leader — Plan: A critical SharePoint vulnerability with a public PoC and confirmed exploitation warrants confirming on-prem SharePoint exposure with your engineering team and ensuring an emergency patch window is scheduled this week if not already done.
This entry was curated and judged by AI (Claude) with automated enrichment
(CISA KEV / EPSS / public PoC). Verify against the original source before
acting. Found a bad verdict?
Report it —
confirmed errors go to the corrections log.