Tag Archives: Microsoft

About Remote Code Execution – Microsoft SharePoint Server “ToolShell” (CVE-2025-53770) vulnerability

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About Remote Code Execution - Microsoft SharePoint Server ToolShell (CVE-2025-53770) vulnerability

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 reported mass exploitation of this vulnerability in conjunction with the spoofing vulnerability CVE-2025-53771. CVE-2025-53770 and CVE-2025-53771 are evolutions of the vulnerabilities CVE-2025-49704 and CVE-2025-49706 from the July MSPT.

🔻 On July 19, Microsoft released updates for SharePoint Server 2016, 2019, and Subscription Edition. They also recommended integrating with the Antimalware Scan Interface.

🔨 Public exploits have been available on GitHub since July 21.

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July “In the Trend of VM” (#17): vulnerabilities in Microsoft Windows and Roundcube

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July In the Trend of VM (#17): vulnerabilities in Microsoft Windows and Roundcube

July “In the Trend of VM” (#17): vulnerabilities in Microsoft Windows and Roundcube. A traditional monthly roundup. This time, it’s a very short one. 🙂

🗞 Post on Habr (rus)
🗒 Digest on the PT website (rus)

Only three trending vulnerabilities:

🔻 Remote Code Execution – Internet Shortcut Files (CVE-2025-33053)
🔻 Elevation of Privilege – Windows SMB Client (CVE-2025-33073)
🔻 Remote Code Execution – Roundcube (CVE-2025-49113)

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About Remote Code Execution – Internet Shortcut Files (CVE-2025-33053) vulnerability

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About Remote Code Execution - Internet Shortcut Files (CVE-2025-33053) vulnerability

About Remote Code Execution – Internet Shortcut Files (CVE-2025-33053) vulnerability. A vulnerability from the June Microsoft Patch Tuesday. This vulnerability immediately showed signs of exploitation in the wild. This flaw allows a remote attacker to execute arbitrary code when a victim opens a specially crafted .url file, delivered, for example, through a phishing attack.

🔹 The vulnerability was reported by Check Point researchers. On June 10, the day of Microsoft’s June Patch Tuesday, they published technical details on their website. The vulnerability had been exploited by the APT group Stealth Falcon since at least March 2025. The exploitation led to the download and execution of malware (Horus Agent) from the attacker’s WebDAV server.

🔹 Exploits for this vulnerability have been available on GitHub since June 12.

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July Microsoft Patch Tuesday

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July Microsoft Patch Tuesday

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 (CVE-2025-48799). This vulnerability may be exploited on Windows 11/10 hosts with two or more hard drives.

Notable among the rest:

🔹 RCE – CDPService (CVE-2025-49724), KDC Proxy Service (CVE-2025-49735), SharePoint (CVE-2025-49704, CVE-2025-49701), Hyper-V DDA (CVE-2025-48822), MS Office (CVE-2025-49695), NEGOEX (CVE-2025-47981), MS SQL Server (CVE-2025-49717)
🔹 InfDisc – MS SQL Server (CVE-2025-49719)
🔹 EoP – MS VHD (CVE-2025-49689), TCP/IP Driver (CVE-2025-49686), Win32k (CVE-2025-49727, CVE-2025-49733, CVE-2025-49667), Graphics Component (CVE-2025-49732, CVE-2025-49744)

🗒 Full Vulristics report

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About Elevation of Privilege – Windows SMB Client (CVE-2025-33073) vulnerability

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About Elevation of Privilege - Windows SMB Client (CVE-2025-33073) vulnerability

About Elevation of Privilege – Windows SMB Client (CVE-2025-33073) vulnerability. A vulnerability from the June Microsoft Patch Tuesday allows an attacker to execute a malicious script, forcing the victim’s host to connect to the attacker’s SMB server and authenticate, resulting in gaining SYSTEM privileges.

🔹 Details on how to exploit the vulnerability were published on June 11 (the day after MSPT) on the websites of RedTeam Pentesting and Synacktiv companies.

🔹 Exploits for the vulnerability have been available on GitHub since June 15.

🔹 The PT ESC research team confirmed the exploitability of the vulnerability and, on June 24, published an explainer, exploitation methods, and information on detection techniques.

Install the update and enforce SMB signing on domain controllers and workstations.

No in-the-wild exploitation has been reported yet.

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June Microsoft Patch Tuesday

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June Microsoft Patch Tuesday

June Microsoft Patch Tuesday. A total of 81 vulnerabilities, roughly the same as in May. Among them, 15 vulnerabilities were added between the May and June MSPT. There are 3 vulnerabilities with signs of exploitation in the wild:

🔻 RCE – WEBDAV/Internet Shortcut Files (CVE-2025-33053). For successful exploitation, the victim must click on a malicious .url file.
🔻 SFB – Chromium (CVE-2025-4664)
🔻 Memory Corruption – Chromium (CVE-2025-5419)

There’s a PoC for one of the vulnerabilities on GitHub, but I doubt it actually works:

🔸 EoP – Microsoft Edge (CVE-2025-47181)

Other notable ones include:

🔹 RCE – Microsoft Office (CVE-2025-47162, CVE-2025-47164, CVE-2025-47167, CVE-2025-47953), KPSSVC (CVE-2025-33071), SharePoint (CVE-2025-47172), Outlook (CVE-2025-47171)
🔹 EoP – SMB Client (CVE-2025-33073), CLFS (CVE-2025-32713), Netlogon (CVE-2025-33070)

🗒 Full Vulristics report

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About Elevation of Privilege – Windows Common Log File System Driver (CVE-2025-32701, CVE-2025-32706) vulnerabilities

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About Elevation of Privilege - Windows Common Log File System Driver (CVE-2025-32701, CVE-2025-32706) vulnerabilities

About Elevation of Privilege – Windows Common Log File System Driver (CVE-2025-32701, CVE-2025-32706) vulnerabilities. When Microsoft disclosed these vulnerabilities in the May Patch Tuesday, attackers were already exploiting them in the wild. The Common Log File System (CLFS) is a general-purpose logging service that can be used by software clients running in user-mode or kernel-mode.

The impact of exploiting these vulnerabilities is identical: an attacker can gain SYSTEM privileges. Their CVSS vectors are also the same (Base Score: 7.8).

What’s the difference? Bug type: for CVE-2025-32701 it’s CWE-416: Use After Free, while for CVE-2025-32706 it’s CWE-20: Improper Input Validation. CVE-2025-32701 credits MSTIC, while CVE-2025-32706 credits Google TIG and CrowdStrike ART.

No public exploits or exploitation details yet. 🤷‍♂️ But these vulns are likely being used in ransomware attacks, just like the EoP in CLFS (CVE-2025-29824) from April MSPT. 😉

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