Google, Microsoft say Chinese hackers are exploiting SharePoint zero-day | TechCrunch
techcrunch.com
The tech giants have evidence that Chinese hackers are exploiting the new bug, but warned "multiple actors" are also hacking into affected SharePoint systems.

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.

  • just_another_person@lemmy.worldEnglish
    15·
    2 days ago

    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.

    • Dr. Moose@lemmy.worldOPEnglish
      31·
      2 days ago

      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.

        • overload@sopuli.xyzEnglish
          21·
          2 days ago

          I did… It looks like the bug has been exploited for a couple of weeks now, with a patch only being released on 20th of July? That makes it zero-day

          The bug is regarded as a zero-day because the vendor — Microsoft, in this case — had no time to issue a patch before it was actively exploited.

          Edit: realised we might have different definition of zero day. Depends whether you consider that the vendor didn’t know about the issue, or there isn’t a patch available upon exploitation of the vulnerability.

            • overload@sopuli.xyzEnglish
              1·
              2 days 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.