error reporting

Winsage
January 13, 2026
Microsoft's January 2026 Patch Tuesday update, KB5074109, addresses 114 vulnerabilities, including a critical zero-day vulnerability (CVE-2026-20805) in the Windows Desktop Window Manager (DWM) that has been actively exploited. The update is applicable to Windows 11 versions 24H2 and 25H2 and includes security enhancements and updates to AI components. Other high-severity vulnerabilities addressed include CVE-2026-20816 (privilege escalation in Windows Installer), CVE-2026-20817 (elevation of privilege in Windows Error Reporting), CVE-2026-20840 (vulnerability in Windows NTFS), CVE-2026-20843 (flaw in Routing and Remote Access Service), CVE-2026-20860 (vulnerability in Ancillary Function Driver for WinSock), and CVE-2026-20871 (another DWM vulnerability). The update removes legacy modem drivers to minimize the attack surface and resolves reliability issues in Azure Virtual Desktop and WSL networking. It also changes the default setting for Windows Deployment Services (WDS) to disable hands-free deployment. Users can install the update through Windows Update, and a system reboot is required for full application.
Winsage
December 4, 2025
Windows has traditionally held a dominant market share in operating systems, but Linux is gaining traction, particularly after Microsoft ended support for Windows 10 on October 14, 2025. Zorin OS, a Linux distribution, attracted around 780,000 former Windows users within a month of this announcement. Bazzite delivered a petabyte of ISO files in one month, indicating a growing interest among Windows 10 users in alternatives to Windows 11. Linus Torvalds highlighted that many blue screen errors in Windows are linked to hardware issues rather than software bugs and recommended using Error-Correcting Code (ECC) memory for better stability. Microsoft has changed its error reporting from the blue screen of death to a black screen to enhance security and prevent destabilizing updates. There are three types of Blue Screen of Death errors: the Windows 3.1 Ctrl+Alt+Del screen, the Windows 95 kernel error, and the Windows NT kernel error.
Winsage
November 4, 2025
A recent Microsoft security update (KB5070881) aimed at fixing a critical vulnerability in the Windows Server Update Service (WSUS) inadvertently disrupted hotpatching for some Windows Server 2025 systems enrolled in the Hotpatch program. This disruption prevents affected servers from applying updates without requiring a restart, forcing administrators to revert to traditional cumulative updates until January 2026. The vulnerability, CVE-2025-59287, allowed potential remote code execution by exploiting weaknesses in WSUS. Microsoft has since released a new update (KB5070893) that addresses the vulnerability while restoring hotpatching capabilities for those who have not yet installed the problematic update.
Winsage
November 3, 2025
An out-of-band security update, KB5070881, has disrupted the hotpatching feature for some Windows Server 2025 devices. This update was released alongside reports of the CVE-2025-59287 remote code execution vulnerability. The Cybersecurity and Infrastructure Security Agency (CISA) has instructed U.S. government agencies to strengthen their systems against this vulnerability. Microsoft has acknowledged that the OOB update caused some Hotpatch-enrolled Windows Server 2025 systems to lose their enrollment status and has ceased distributing the update to these devices. Those who installed the update will not receive Hotpatch updates in November and December but will get standard monthly security updates. Administrators can install the KB5070893 security update to address the CVE-2025-59287 flaw without disrupting hotpatching. Microsoft has also disabled the display of synchronization error details in its WSUS error reporting system and resolved various issues affecting Windows 11.
Tech Optimizer
September 24, 2025
Endpoint detection and response (EDR) systems and antivirus protections are increasingly targeted by threat actors using sophisticated techniques. A new method called EDR-Freeze has been introduced, which utilizes Windows Error Reporting and the MiniDumpWriteDump function to hibernate antivirus processes without needing to install vulnerable drivers. This technique operates entirely in user mode and was disclosed by an anonymous researcher known as Two One Seven Three on Zero Salarium. The MiniDumpWriteDump function can suspend all threads within a target process during the dump process, which is crucial to avoid memory corruption. The researcher faced challenges with the rapid execution of MiniDumpWriteDump and the security measures protecting EDR and antivirus processes. By reverse-engineering the WerFaultSecure program, the researcher enabled MiniDumpWriteDump for any chosen process and integrated it with the CreateProcessAsPPL tool to bypass Protected Process Light (PPL) protections. The researcher proposed a race condition attack consisting of four steps: executing WerFaultSecure with WinTCB-level protection, configuring it to dump the target process, monitoring the target process until it is suspended, and then suspending the WerFaultSecure process. A tool to execute this exploit is available on GitHub, and another researcher has developed a KQL rule for its detection. The EDR-Freeze technique exploits a vulnerability in the WerFaultSecure program, addressing the weaknesses of the BYOVD method and allowing flexible control over EDR and antivirus programs.
Winsage
September 22, 2025
A new technique called EDR-Freeze allows evasion of security solutions through Microsoft's Windows Error Reporting (WER) system, enabling attackers to suspend endpoint detection and response (EDR) tools without relying on vulnerable drivers. Security researcher TwoSevenOneThree utilized the WER framework and the MiniDumpWriteDump API to indefinitely suspend EDR and antivirus processes by exploiting the WerFaultSecure component, which operates with Protected Process Light (PPL) privileges. The method involves spawning WerFaultSecure, invoking MiniDumpWriteDump on the target process, monitoring the target until it is suspended, and then freezing the dumper. A tool has been developed to automate this process, successfully tested on Windows 11 24H2, which froze the Windows Defender process. To mitigate this attack, monitoring WER for identifiers linked to sensitive processes is recommended, and security researcher Steven Lim has created a tool to map WerFaultSecure to Microsoft Defender Endpoint processes. Microsoft has the opportunity to enhance these components against misuse by implementing restrictions on suspicious invocations.
Tech Optimizer
September 22, 2025
A security researcher has developed a tool called EDR-Freeze that allows for the temporary disabling of endpoint detection and response (EDR) systems and antivirus software without using vulnerable drivers. EDR-Freeze exploits the Windows Error Reporting functionality to execute a race condition attack that suspends security processes, specifically targeting the WerFaultSecure.exe process. The tool can successfully suspend the MsMpEng.exe process of Windows Defender on Windows 11 24H2. It operates entirely within user-mode and uses legitimate Windows components, making detection more difficult for security teams. The source code for EDR-Freeze is publicly available on GitHub, intended for legitimate security research, but poses risks of misuse by malicious actors. Security teams are advised to monitor for suspicious activity related to WerFaultSecure.exe and to enhance their process protection mechanisms.
Search