Microsoft today released patches for 67 vulnerabilities. 10 of these vulnerabilities are rated critical. One vulnerability has already been exploited and another vulnerability has been publicly disclosed before today.

Notable Vulnerabilities:

CVE-2025-33053: WebDAV remote code execution vulnerability. This vulnerability has already been exploited. Microsoft rates it as important. This affects the client part of WebDAV, not the server part. User interaction is required. If an attacker can control the file name and path, they can trick the victim into executing code over the network. This is another issue related to the still supported remnants of Internet Explorer, like the Scripting Engine and MSHTML. You must apply the IE Cumulative Update to patch, even if you no longer use IE.

CVE-2025-33073: A Windows SMB client elevation of Privilege Vulnerability. This vulnerability has already been disclosed but Microsoft has not yet observed it being exploited. An attacker exploiting this vulnerability will gain SYSTEM privileges. But Microsoft considers successful exploitation less likely. An attacker would need the victim to connect to a malicious SMB server.

CVE-2025-32710: An unauthenticated remote code execution vulnerability in the remote desktop service. But it requires the exploitation of a race condition. Microsoft believes it is less likely that an exploit will become available.

CVE-2025-29828: Microsoft states that this vulnerability is due to a "missing release of memory after effective lifetime in Windows Cryptographic Services allows an unauthorized attacker to execute code over a network". This vulnerability worries me a bit if this could be used to exploit various TLS services. However, not enough is known to gauge the exploitability. Microsoft considers the attack as "highly complex" and exploitation as less likely.

Microsoft Office Remote Code Execution Vulnerability: Four of the critical vulnerabilities apply to Microsoft Office. These are rated critical as they may be exploited via the preview pane, without actually opening the malicious document.

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Johannes B. Ullrich, Ph.D. , Dean of Research, SANS.edu
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