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Microsoft fixes three SharePoint zero-day exploits used in series of cyberattacks - how to patch them

Microsoft has patched two critical zero-day SharePoint security flaws that have already been exploited by hackers to attack vulnerable organizations.

CPO Magazine · 9h

Microsoft Releases Emergency Updates Amid Active Exploitation of SharePoint Zero-Day Vulnerability Chain

· 4d · on MSN

New zero-day bug in Microsoft SharePoint under widespread attack

· 2d

U.S. nuclear and health agencies hit in Microsoft SharePoint breach

The National Institutes of Health and the federal agency responsible for securing the nation’s nuclear weapons were among the victims in a global breach of Microsoft server software over the weekend,...

· 1d

Tally of Microsoft victims surges to 400 as hackers exploit SharePoint flaw

· 1d

Chinese Hackers Are Exploiting Flaws in Widely Used Software, Microsoft Says

· 1d

Microsoft says some SharePoint server hackers now use ransomware

The disclosure marks a potential escalation in the campaign, which has already hit at least 400 victims, according to Netherlands-based cybersecurity firm Eye Security.

· 1d

Nuclear Weapons Agency Breached in Microsoft SharePoint Hack

· 1d

The SharePoint flaw has now hit over 400 companies including a US nuclear administration

Hackers attack Microsoft SharePoint, targeting organizations like U.S nuclear security

Microsoft blamed two Chinese nation-state actors for exploiting recently discovered security flaws in SharePoint to infiltrate vulnerable organizations, like schools, state governments, and the U.S. government’s top nuclear security agency.

The Hacker News5d

Critical Unpatched SharePoint Zero-Day Actively Exploited, Breaches 75+ Company Servers

The U.S. Cybersecurity and Infrastructure Security Agency (CISA), in an alert, said it's aware of active exploitation of CVE-2025-53770, which enables unauthenticated access to SharePoint systems and arbitrary code execution over the network.

SecurityWeek1d

ToolShell Attacks Hit 400+ SharePoint Servers, US Government Victims Named

More information has emerged on the ToolShell SharePoint zero-day attacks, including impact, victims, and threat actors.

Asianet Newsable on MSN2d

US Nuclear Weapons Agency Reportedly Hit In Microsoft ‘Zero-Day’ Breach — DOE Says Impact Was Minimal

Providing additional updates on the breach, Microsoft said in a blog post on Tuesday that two Chinese nation-state operators, Linen Typhoon and Violet Typhoon, exploited vulnerabilities in the internet-facing SharePoint servers.

The Hacker News3d

Hackers Exploit SharePoint Zero-Day Since July 7 to Steal Keys, Maintain Persistent Access

Active SharePoint exploits since July 7 target governments and tech firms globally, risking key theft and persistent access.