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August “In the Trend of VM” (#18): vulnerabilities in Microsoft Windows and SharePoint
August “In the Trend of VM” (#18): vulnerabilities in Microsoft Windows and SharePoint. A traditional monthly roundup – this time, it’s extremely short. 🗞 Post on Habr (rus)🗒 Digest on the PT website (rus) Only two trending vulnerabilities: 🔻 Remote Code Execution – Microsoft SharePoint Server “ToolShell” (CVE-2025-53770). The vulnerability is being widely exploited; attackers […]
August “In the Trend of VM” (#18): vulnerabilities in Microsoft Windows and SharePoint. A traditional monthly roundup – this time, it’s extremely short.
🗞 Post on Habr (rus)
🗒 Digest on the PT website (rus)
Only two trending vulnerabilities:
🔻 Remote Code Execution – Microsoft SharePoint Server “ToolShell” (CVE-2025-53770). The vulnerability is being widely exploited; attackers may even have gained access to U.S. nuclear secrets. The vulnerability is also relevant for Russia.
🔻 Elevation of Privilege – Windows Update Service (CVE-2025-48799). The vulnerability affects Windows 10/11 installations with at least two hard drives.
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Related news
August Microsoft Patch Tuesday. A total of 132 vulnerabilities, 20 fewer than in July. Of these, 25 were added between the July and August MSPT. Three are actively exploited, including two related to the trending SharePoint “ToolShell” flaw, exploited since July 17. 🔻 RCE – Microsoft SharePoint Server (CVE-2025-53770)🔻 Spoofing – Microsoft SharePoint Server (CVE-2025-53771) […]
About Elevation of Privilege – Windows Update Service (CVE-2025-48799) vulnerability. This vulnerability is from the July Microsoft Patch Tuesday. Improper link resolution before file access (‘link following’) in the Windows Update Service allows an authorized attacker to elevate privileges to “NT AUTHORITY\SYSTEM”. 🛠 An exploit for this vulnerability was published by researcher Filip Dragović (Wh04m1001) […]
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Brave browser now blocks Microsoft Recall by default, preventing screenshots and protecting users’ browsing history on Windows 11.
National Nuclear Security Administration and National Institutes of Health targeted in global Microsoft SharePoint vulnerability exploitation. Chinese hacking groups suspected in widespread data breaches.
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About Remote Code Execution – Microsoft SharePoint Server “ToolShell” (CVE-2025-53770) vulnerability. SharePoint is a web application developed by Microsoft for corporate intranet portals, document management, and collaborative work. A flaw in the deserialization mechanism of an on-premises SharePoint Server instance allows remote unauthenticated attackers to execute arbitrary code. 👾 On July 18, Eye Security researchers […]
Hackers are exploiting critical SharePoint flaws (CVE-2025-53770/53771) to breach global targets, including governments and corporations. Microsoft urges immediate action. Learn about the active attacks and how to protect your network from credential theft and backdoors.
Cisco Talos is aware of the ongoing exploitation of CVE-2025-53770 and CVE-2025-53771 in the wild. These are path traversal vulnerabilities affecting SharePoint Server Subscription Edition, SharePoint Server 2016, and SharePoint Server 2019.
On Sunday, July 20, Microsoft Corp. issued an emergency security update for a vulnerability in SharePoint Server that is actively being exploited to compromise vulnerable organizations. The patch comes amid reports that malicious hackers have used the Sharepoint flaw to breach U.S. federal and state agencies, universities, and energy companies.
Summary Microsoft is aware of active attacks targeting on-premises SharePoint Server customers. The attacks are exploiting a variant of CVE-2025-49706. This vulnerability has been assigned CVE-2025-53770. SharePoint Online in Microsoft 365 is not impacted. A patch is currently not available for this vulnerability. Mitigations and detections are provided below.
July Microsoft Patch Tuesday. A total of 152 vulnerabilities – twice as many as in June. Of these, 15 vulnerabilities were added between the June and July MSPT. One vulnerability is exploited in the wild: 🔻 Memory Corruption – Chromium (CVE-2025-6554) One vulnerability has an exploit available on GitHub: 🔸 EoP – Windows Update Service […]