The Rapid7 September 2025 Threat Report highlights active exploitation of a critical Microsoft SharePoint vulnerability, CVE-2025-53770. This zero-day is being used by threat actors to gain initial access to victim networks, with exploitation observed in government as well as multiple other industries.
SharePoint remains a widely deployed collaboration platform in federal, state, and local agencies, resulting in the need for urgent attention among public sector organizations. The combination of its ubiquity and sensitive data handling makes it a prime target. Recent reporting shows attackers are moving fast to take advantage of this flaw, and many agencies faced tight deadlines this summer to apply mitigations under federal directives. This isn’t the first time SharePoint has been targeted.
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Source: Rapid7
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