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Google, Microsoft say Chinese hackers are exploiting SharePoint zero-day (techcrunch.com)
submitted 1 year ago by to c/technology@lemmy.world
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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.

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[–] 5 points 1 year ago (1 child)

Zero day is typically defined as there being zero days since the vulnerability is known to the developer, in other words, it being unknown at the time of the exploit.

https://en.wikipedia.org/wiki/Zero-day_vulnerability?wprov=sfla1

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  • [–] 1 point 1 year ago*

    Ah thank you. I thought zero day and 1 day vulnerabilities were: 0-day = vulnerability is not known to the vendor and so there is no patch. If exploited, it is a 0-day attack. 1-day = vulnerability is known and patch is available, but not all systems are patched.

    I.E. the actual number of days doesn't matter.

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