Security researchers at Google and Microsoft say they have evidence that hackers backed by China are exploiting a zero-day bug in Microsoft SharePoint, as companies around the world scramble to patch the flaw.

The bug, known officially as CVE-2025-53770 and discovered last weekend, allows hackers to steal sensitive private keys from self-hosted versions of SharePoint, a software server widely used by companies and organizations to store and share internal documents. Once exploited, an attacker can use the bug to remotely plant malware and gain access to the files and data stored within, as well as gain access to other systems on the same network.

Google, Microsoft say Chinese hackers are exploiting SharePoint zero-day | TechCrunch

The tech giants have evidence that Chinese hackers are exploiting the new bug, but warned "multiple actors" are also hacking into affected SharePoint systems.

TechCrunch (techcrunch.com)

The attack exploits SharePoint vulnerabilities originally disclosed at a Berlin hacking competition in May, where a Vietnamese cybersecurity researcher received a $100,000 bounty for discovering the flaws. Reuters reported that Microsoft was allegedly informed of the vulnerabilities in May but failed to fully address them in an initial July patch

And

Several cybersecurity experts compared the SharePoint campaign to the 2021 Microsoft Exchange server attacks that compromised US government systems. Former FBI Cyber Unit deputy director Cynthia Kaiser warned that hackers "already in their systems may lie dormant for extended periods before operationalizing"

Just shows in what a poor position US is now. Allies discovered it, reported it, feds didn't prepare for it and Chinese are in. Incredible incompetence except for US allies that despite US' isolationism still care.

Source

Security researchers at Google and Microsoft say they have evidence that hackers backed by China are exploiting a zero-day bug in Microsoft SharePoint, as companies around the world scramble to patch the flaw.

The bug, known officially as CVE-2025-53770 and discovered last weekend, allows hackers to steal sensitive private keys from self-hosted versions of SharePoint, a software server widely used by companies and organizations to store and share internal documents. Once exploited, an attacker can use the bug to remotely plant malware and gain access to the files and data stored within, as well as gain access to other systems on the same network.

Google, Microsoft say Chinese hackers are exploiting SharePoint zero-day | TechCrunch

The tech giants have evidence that Chinese hackers are exploiting the new bug, but warned "multiple actors" are also hacking into affected SharePoint systems.

TechCrunch (techcrunch.com)

This is what you get when you don't patch your shit after being told about it MONTHS before it was demonstrated, and MONTHS after.

Security researchers at Google and Microsoft say they have evidence that hackers backed by China are exploiting a zero-day bug in Microsoft SharePoint, as companies around the world scramble to patch the flaw.

The bug, known officially as CVE-2025-53770 and discovered last weekend, allows hackers to steal sensitive private keys from self-hosted versions of SharePoint, a software server widely used by companies and organizations to store and share internal documents. Once exploited, an attacker can use the bug to remotely plant malware and gain access to the files and data stored within, as well as gain access to other systems on the same network.

Google, Microsoft say Chinese hackers are exploiting SharePoint zero-day | TechCrunch

The tech giants have evidence that Chinese hackers are exploiting the new bug, but warned "multiple actors" are also hacking into affected SharePoint systems.

TechCrunch (techcrunch.com)

This is what you get when you don't patch your shit after being told about it MONTHS before it was demonstrated, and MONTHS after.

Security researchers at Google and Microsoft say they have evidence that hackers backed by China are exploiting a zero-day bug in Microsoft SharePoint, as companies around the world scramble to patch the flaw.

The bug, known officially as CVE-2025-53770 and discovered last weekend, allows hackers to steal sensitive private keys from self-hosted versions of SharePoint, a software server widely used by companies and organizations to store and share internal documents. Once exploited, an attacker can use the bug to remotely plant malware and gain access to the files and data stored within, as well as gain access to other systems on the same network.

Google, Microsoft say Chinese hackers are exploiting SharePoint zero-day | TechCrunch

The tech giants have evidence that Chinese hackers are exploiting the new bug, but warned "multiple actors" are also hacking into affected SharePoint systems.

TechCrunch (techcrunch.com)

Security researchers at Google and Microsoft say they have evidence that hackers backed by China are exploiting a zero-day bug in Microsoft SharePoint, as companies around the world scramble to patch the flaw.

The bug, known officially as CVE-2025-53770 and discovered last weekend, allows hackers to steal sensitive private keys from self-hosted versions of SharePoint, a software server widely used by companies and organizations to store and share internal documents. Once exploited, an attacker can use the bug to remotely plant malware and gain access to the files and data stored within, as well as gain access to other systems on the same network.

Google, Microsoft say Chinese hackers are exploiting SharePoint zero-day | TechCrunch

The tech giants have evidence that Chinese hackers are exploiting the new bug, but warned "multiple actors" are also hacking into affected SharePoint systems.

TechCrunch (techcrunch.com)

That’s not a zero-day… Really dislike media that waters down or misuse terminology

Security researchers at Google and Microsoft say they have evidence that hackers backed by China are exploiting a zero-day bug in Microsoft SharePoint, as companies around the world scramble to patch the flaw.

The bug, known officially as CVE-2025-53770 and discovered last weekend, allows hackers to steal sensitive private keys from self-hosted versions of SharePoint, a software server widely used by companies and organizations to store and share internal documents. Once exploited, an attacker can use the bug to remotely plant malware and gain access to the files and data stored within, as well as gain access to other systems on the same network.

Google, Microsoft say Chinese hackers are exploiting SharePoint zero-day | TechCrunch

The tech giants have evidence that Chinese hackers are exploiting the new bug, but warned "multiple actors" are also hacking into affected SharePoint systems.

TechCrunch (techcrunch.com)

Well, it's a zero day for 24 hours, right?

Yepp - it was, but that day was 11. June

I don't think that's true either, based on the reporting it's based on a bug disclosed at a hacking conference in May. No clue how this is a zero day if it's based on a 2 month old bug reported to the vendor.

Seems more like bog standard Microsoft fucking around and waiting too long to patch before it got used.

That’s not a zero-day… Really dislike media that waters down or misuse terminology

This is a zero-day bug though?

Even then this clearly effects US' federal government so all this talk of domestic security for bringing back businesses to US are quite laughable with this context.

That’s not a zero-day… Really dislike media that waters down or misuse terminology

almost makes one forget this is a problem that Microsoft created.

This is a zero-day bug though?