Microsoft SharePoint Zero-Day
ID: 16ead6a7-b46d-5211-8430-2aba7625e6c5
STIX ID: report--16ead6a7-b46d-5211-8430-2aba7625e6c5
Feed Name: Schneier on Security
Threat Score
A critical Microsoft SharePoint zero-day (CVE-2025-53770, CVSS 9.8) is being actively exploited worldwide by Chinese-linked attackers to gain unauthenticated remote access to on-premises SharePoint servers and exfiltrate authentication credentials and data; Microsoft, CISA and security vendors have published patches and guidance, but active exploitation and credential theft make this an ongoing high-impact incident.
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