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.
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.
This is a zero-day bug though?
It’s not, the title lies.
Read the article
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.
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
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.
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.
Yeah; allies still care because of the US military industrial complex. Compromising the US still compromises a large chunk of the world, making things even worse for everyone than the current US administration can do on its own.
And the rest of the world are not petulant children ready and willing to remove any semblance of cooperation, appreciation or decency.
almost makes one forget this is a problem that Microsoft created.
Well yes these type of things can happen to virtually any type of complex software to anyone. Though the lacking response is concerning.
concerning
Or a trend.
That’s not a zero-day… Really dislike media that waters down or misuse terminology
It’s not just media. The number of software engineers I’ve heard talk about “fixing” a “zero day” in a code dependency by updating to a patched version…
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 bot standard Microsoft fucking around and waiting too long to patch before it got used.
Iirc there was a previous attempt to patch this, it would appear a slight variation was not fixed in the patch. Might be why people are saying zero day.
wonder if they got a case to sue for damages if microsoft has been slow at dealing with the issue
SharePoint is a nightmare. 😥
Agree. I work with an org that uses SharePoint, I don’t. When they share docs with me, I can’t directly transfer (or maybe I haven’t found how) to One drive. I mean, they are both MS Cloud. Why?
Micro$oft is a nightmare.
Heck, all of big tech is a nightmare.
When I say things like, “Use linux, the attack surface is much smaller”, people say, “well, that won’t last forever”, to which I say, “if a trillion dollar company can drop the ball like this, I’m taking the route less travelled because society doesn’t change quickly, Microsoft isn’t going anywhere in my forseeable future”
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More primitive anti-china propaganda. Who believes this thick nonsense ? The western Plutocracy are really firing it up ! Imagine that the fascist techlords are now suddenly ‘trustworthy’ good guys - and joining up with ‘national security’ in a little ww3-mongering propaganda campaign. I’m sure there’s no cheating and the evidence would hold up - if anyone ever got to check it out oc… tsk tsk…
