NewApp Digest
search bot

code execution

Microsoft to Block Windows 11 and Server 2025 Automated Installation After Critical RCE Vulnerability
Winsage
March 17, 2026

Microsoft to Block Windows 11 and Server 2025 Automated Installation After Critical RCE Vulnerability

Microsoft is implementing a two-phase initiative to disable the hands-free deployment feature in Windows Deployment Services (WDS) due to a critical remote code execution vulnerability (CVE-2026-0386) identified on January 13, 2026. This vulnerability arises from improper access control related to the Unattend.xml file, which is transmitted over an unauthenticated RPC channel, allowing attackers on the same network segment to exploit it. Successful exploitation could grant SYSTEM-level privileges and compromise OS deployment images. The initiative includes: - Phase 1 (January 13, 2026): The hands-free deployment feature will remain operational but can be disabled. New Event Log alerts and registry key controls will be introduced to enforce secure practices. - Phase 2 (April 2026): The hands-free deployment feature will be completely disabled by default for administrators who have not modified registry settings. Administrators can temporarily re-enable the feature by setting AllowHandsFreeFunctionality = 1, but this is not secure. Recommendations include reviewing WDS configurations, applying security updates, setting registry keys for secure behavior, monitoring Event Viewer for alerts, and considering alternative deployment methods. Microsoft’s KB article 5074952 provides further guidance for impacted organizations.
Microsoft Releases Emergency Windows 11 Hotpatch to Fix Remote Code Execution Flaw
Winsage
March 15, 2026

Microsoft Releases Emergency Windows 11 Hotpatch to Fix Remote Code Execution Flaw

Microsoft has released an out-of-band hotpatch update, KB5084597, to address three critical remote code execution vulnerabilities (CVE-2026-25172, CVE-2026-25173, CVE-2026-26111) in the Windows Routing and Remote Access Service (RRAS) management tool. This update is specifically for Windows 11 Enterprise devices in the hotpatch program that did not receive fixes during the March 2026 Patch Tuesday. The vulnerabilities can be exploited by an authenticated attacker within the domain, potentially leading to remote code execution. Hotpatch updates apply fixes through in-memory patching without requiring a device reboot, making them suitable for mission-critical devices. The update is applicable to Windows 11 versions 24H2, 25H2, and Windows 11 Enterprise LTSC 2024, and will be automatically installed on enrolled devices without a restart. Non-enrolled devices received the fix via the standard March 10 Patch Tuesday update.
Microsoft Patch Tuesday, March 2026 Edition
Winsage
March 11, 2026

Microsoft Patch Tuesday, March 2026 Edition

Microsoft Corp. has released security updates addressing at least 77 vulnerabilities across its Windows operating systems and various software applications. Key vulnerabilities include: - CVE-2026-21262: Allows an attacker to elevate privileges on SQL Server 2016 and later, with a CVSS v3 base score of 8.8. - CVE-2026-26127: Affects applications running on .NET, potentially leading to denial of service. - CVE-2026-26113 and CVE-2026-26110: Remote code execution flaws in Microsoft Office exploitable by viewing malicious messages in the Preview Pane. - CVE-2026-24291, CVE-2026-24294, CVE-2026-24289, and CVE-2026-25187: Privilege escalation vulnerabilities rated CVSS 7.8. - CVE-2026-21536: A critical remote code execution bug identified by an AI agent, marking a shift toward AI-driven vulnerability discovery. Additionally, Microsoft previously addressed nine browser vulnerabilities and issued an out-of-band update on March 2 for Windows Server 2022. Adobe has released updates for 80 vulnerabilities across its products, and Mozilla Firefox version 148.0.2 has resolved three high-severity CVEs.
PoC Published for Microsoft Windows Flaw That Allows Low-Privileged Users to Force Irrecoverable BSODs
Winsage
February 26, 2026

PoC Published for Microsoft Windows Flaw That Allows Low-Privileged Users to Force Irrecoverable BSODs

Security researchers have developed a working Proof of Concept (PoC) exploit for a vulnerability in the Windows kernel, identified as CVE-2026-2636, which allows low-privileged users to induce a Blue Screen of Death (BSoD), resulting in a Denial of Service. This vulnerability is linked to the Windows Common Log File System (CLFS) driver, specifically the CLFS.sys component, and arises from improper handling of invalid or special elements within CLFS (CWE-159). The PoC demonstrates that a non-administrative user can trigger the bug by executing a crafted ReadFile operation on a handle linked to an opened .blf log file without the expected I/O Request Packet (IRP) flags set. This leads to a critical inconsistency in the driver, causing Windows to invoke the kernel routine KeBugCheckEx, which results in a BSoD. The CVE-2026-2636 has a CVSS score of 5.5 (Medium) and poses a high impact on availability, allowing any authenticated user to crash the host reliably. Microsoft addressed this vulnerability in the September 2025 cumulative update, protecting systems running Windows 11 2024 LTSC and Windows Server 2025 by default. However, older or unpatched builds remain vulnerable. Organizations are advised to verify the deployment of the September 2025 updates, prioritize patching multi-user systems, and monitor for unusual spikes in BSoD events.
Microsoft Windows 11 KB5077181 Update Triggers Infinite Restart Loop on Some Devices
Winsage
February 17, 2026

Microsoft Windows 11 KB5077181 Update Triggers Infinite Restart Loop on Some Devices

Microsoft's Patch Tuesday update, KB5077181, released on February 10, 2026, has caused significant boot failures for users of Windows 11 versions 24H2 (OS build 26200.7840) and 25H2 (OS build 26100.7840), resulting in endless restart loops. Users are reporting over 15 reboot cycles, preventing access to their desktops. Issues include System Event Notification Service (SENS) errors and DHCP problems affecting internet connectivity. Installation errors with codes 0x800f0983 and 0x800f0991 indicate potential hardware, driver, or servicing stack incompatibilities. The update was intended to address 58 vulnerabilities, including six zero-days, but the boot loop issue has overshadowed these enhancements. CVE IDs and their CVSS scores related to the vulnerabilities addressed include: - CVE-2026-21510: 7.5 - CVE-2026-21519: 7.8 - CVE-2026-21533: 8.8 - CVE-2026-20841: 7.1 As of February 15, 2026, there is no "known issues" entry in Microsoft's release notes despite user reports. Users can uninstall the update through the Control Panel if their systems are accessible, or use the Windows Recovery Environment to execute commands for uninstallation if their systems are unbootable.
Phishing Lures Spread XWorm Remote Access Trojan
Tech Optimizer
February 16, 2026

Phishing Lures Spread XWorm Remote Access Trojan

A cyber-espionage campaign is utilizing the XWorm Remote Access Trojan (RAT) to infiltrate systems via phishing emails and a Microsoft Office vulnerability (CVE-2018-0802). XWorm, first detected in 2022, allows attackers remote control over infected computers for surveillance and data theft. The campaign uses business-oriented phishing emails with malicious Excel attachments that exploit the vulnerability to execute a fileless attack. The malware connects to a command-and-control server, encrypting communications and transmitting system details. XWorm features a plugin architecture with over 50 modules for various malicious activities, including credential theft and DDoS attacks. Security experts highlight the ongoing risk of legacy software vulnerabilities and recommend patching outdated components.
Multiple Flaws Found in Microsoft Windows & Office — Could Let Hackers In
Winsage
February 16, 2026

Multiple Flaws Found in Microsoft Windows & Office — Could Let Hackers In

Microsoft has identified at least six zero-day vulnerabilities in Windows and Microsoft Office that were actively being exploited by hackers before patches were released. These vulnerabilities allow attackers to compromise systems with minimal user interaction, such as clicking on malicious links or opening compromised Office documents. Notable examples include a Windows Shell Security Bypass (CVE-2026-21510) and an Office File Exploit that can execute malicious code. The vulnerabilities pose serious risks, including active exploitation, remote code execution, and the potential for malware installation and credential theft. Microsoft has released security patches to address these vulnerabilities, and users are urged to install them immediately. The affected systems include all supported versions of Windows and Microsoft Office applications. Users are advised to install updates, be cautious with emails and links, enable security tools, and keep software up to date.
Microsoft Fixes Critical Windows 11 Notepad Flaw
Winsage
February 14, 2026

Microsoft Fixes Critical Windows 11 Notepad Flaw

Microsoft has released a patch for a significant vulnerability in Notepad on Windows 11 that could allow attackers to execute code by opening a Markdown file and clicking on a malicious link. This vulnerability was due to how Notepad processed links within Markdown files, which could trigger unverified protocols to load remote content. The patch now includes a security warning before such links can be activated. Users are advised to check for updates via Windows Update and the Microsoft Store to ensure Notepad and related components are up to date. Security tips include inspecting URLs before clicking and keeping Microsoft Defender features enabled.
Search