Microsoft Windows Server, 10 and 11 users are at risk from a security threat already being used in attacks — update now, CISA warns.
rollout has passed, Microsoft Windows users are still feeling the impact of the record-breaking security vulnerability confirmation, which saw nearly 200for Windows Remote Access Connection Manager and a modem driver that ships natively with supported Windows operating systems vulnerabilities.
Now, CISA has warned, everyone should update a high-severity Windows SMB privilege escalation vulnerability, impacting Windows Server, 10 and 11 users, that is already under attack in the wild, and do so with the utmost urgency. Here’s what you need to know about CVE-2025-33073., requires certain Federal Civilian Executive Branch agencies to update their Windows Server, Windows 10 and Windows 11 systems within a 14-day deadline. However, the impact of CVE-2025-33073, which is already under attack, CISA said, is such that it has urged “all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation.” In other words, pull your finger out and update Windows sooner rather than later, preferably immediately if your systems and processes could be affected by the vulnerability. The CISA warning is particularly incontrovertible, given that CVE-2025-33073, a Windows SMB client elevation of privilege vulnerability that enables an authorized attacker to elevate privileges over a network was, wait for it, confirmed by Microsoft not in the latest Patch Tuesday rollout but in the one that was released in June, when a fix was made available. “These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise,” CISA said. To which I would add, as they are to any business, large or small, or consumer that uses the Microsoft Windows server message block client protocol to share files, printers and other communications on a network. If you haven’t already, you know what to do: update now.
Windows Server Windows 10 Windows 11 Windows Security Update CISA Windows Warning CISA Attack Warning Windows Attack Underway CVE-2025-33073
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