reuters.com - July 30 (Reuters) - More than 90 state and local governments have been targeted using the recently revealed vulnerability in Microsoft server software, according to a U.S. group devoted to helping local authorities collaborate against hacking threats.
The nonprofit Center for Internet Security, which houses an information-sharing group for state, local, tribal, and territorial government entities, provided no further details about the targets, but said it did not have evidence that the hackers had broken through.
None have resulted in confirmed security incidents," Randy Rose, the center's vice president of security operations and intelligence, said in an email.
A wave of hacks hit servers running vulnerable versions of Microsoft SharePoint this month, causing widespread concern. The campaign has claimed at least 400 victims, according to Netherlands-based cybersecurity firm Eye Security. Multiple federal government agencies are reportedly among the victims, and new ones are being identified every day.
On Wednesday, a spokesperson for one of the U.S. Department of Energy's 17 national labs said it was among those hit.
"Attackers did attempt to access Fermilab's SharePoint servers," the spokesperson said, referring to the U.S. Fermi National Accelerator Laboratory. "The attackers were quickly identified, and the impact was minimal, with no sensitive or classified data accessed." The Fermilab incident was first reported by Bloomberg.
The U.S. Department of Energy has previously said the SharePoint security hack has affected "a very small number" of its systems
forbes.com - Microsoft has confirmed that SharePoint Server is under mass attack and no patch is yet available — here’s what you need to know and how to mitigate the threat.
Microsoft Confirms CVE-2025-53770 SharePoint Server Attacks
It’s been quite the few weeks for security warnings, what with Amazon informing 220 million customers of Prime account attacks, and claims of a mass hack of Ring doorbells going viral. The first of those can be mitigated by basic security hygiene, and the latter appears to be a false alarm. The same cannot be said for CVE-2025-53770, a newly uncovered and confirmed attack against users of SharePoint Server which is currently undergoing mass exploitation on a global level, according to the Eye Research experts who discovered it. Microsoft, meanwhile, has admitted that not only is it “aware of active attacks” but, worryingly, “a patch is currently not available for this vulnerability.”
CVE-2025-53770, which is also being called ToolShell, is a critical vulnerability in on-premises SharePoint. The end result of which is the ability for attackers to gain access and control of said servers without authentication. If that sounds bad, it’s because it is. Very bad indeed.
“The risk is not theoretical,” the researchers warned, “attackers can execute code remotely, bypassing identity protections such as MFA or SSO.” Once they have, they can then “access all SharePoint content, system files, and configurations and move laterally across the Windows Domain.”
And then there’s the theft of cryptographic keys. That can enable an attacker to “impersonate users or services,” according to the report, “even after the server is patched.” So, even when a patch is eventually released, and I would expect an emergency update to arrive fairly quickly for this one, the problem isn’t solved. You will, it was explained, “need to rotate the secrets allowing all future tokens that can be created by the malicious actor to become invalid.”
And, of course, as SharePoint will often connect to other core services, including the likes of Outlook and Teams, oh and not forgetting OneDrive, the threat, if exploited, can and will lead to “data theft, password harvesting, and lateral movement across the network,” the researchers warned.
