emergency fix

Winsage
October 29, 2025
Concerns have increased regarding a critical vulnerability in Windows Server Update Services (WSUS), identified as CVE-2025-59287, which allows unauthenticated attackers to execute arbitrary code. This vulnerability arises from a legacy serialization mechanism within WSUS, which is no longer actively developed. The Cybersecurity and Infrastructure Security Agency (CISA) has added this vulnerability to its Known Exploited Vulnerabilities catalog, indicating its urgency. Cybersecurity firms have reported active exploitation attempts, with thousands of WSUS instances exposed to the internet. Attacks are primarily reconnaissance activities that could lead to broader network compromises. If an attacker compromises a single server, they could control the entire patch distribution system, enabling internal supply chain attacks and distributing malware disguised as legitimate Microsoft updates. Alerts have been issued by the Canadian Center for Cybersecurity and the Australian Cyber Security Centre regarding this global threat. Microsoft's initial patch on October 15 failed to fully resolve the issue, allowing attackers to exploit the vulnerability quickly. Attack vectors include exploiting the deserialization of AuthorizationCookie objects and unsafe deserialization via the ReportingWebService. The vulnerability is particularly concerning because WSUS is often neglected and should not be exposed to the internet.
Winsage
October 25, 2025
Microsoft has announced an emergency fix for a critical vulnerability, CVE-2025-59287, affecting Windows Server users, specifically within the Windows Server Update Service (WSUS). The Cybersecurity and Infrastructure Security Agency (CISA) has indicated that attacks exploiting this vulnerability are already occurring. The WSUS Server Role is not enabled by default, meaning only servers with this role activated are at risk unless the fix is applied. CISA has mandated that certain federal agencies address this issue within two weeks and advises organizations to follow Microsoft's guidance to prevent unauthorized remote code execution. Recommended steps include identifying vulnerable servers, applying the security update released on October 23, 2025, and rebooting WSUS servers post-installation. For those unable to update immediately, disabling the WSUS server role and blocking inbound traffic to ports 8530 and 8531 is advised.
Winsage
October 21, 2025
Microsoft is preparing to release an emergency update in response to significant disruptions caused by the recent Windows 11 update, KB5066835, which introduced critical bugs affecting many devices. Users have reported issues such as failure in localhost HTTP/2 connections, inability for locally hosted applications to connect to the network, malfunctioning Logitech hardware, non-responsive mouse and keyboard in the Windows Recovery Environment, and File Explorer documents failing to open in the Preview pane due to a false security alert. Microsoft is working on a patch and advises users to check for updates, which may take up to 48 hours to be available to all. Windows 11 now holds nearly 50% of the market share, while Windows 10, which is unsupported, has a 40% market share.
Winsage
October 19, 2025
Microsoft's latest mandatory security update for Windows 11, KB5066835, has caused significant disruptions, including inoperable localhost connections and multiple installation failures. Users are experiencing issues with locally hosted applications, and the update has also affected certain Logitech peripherals and mouse and keyboard functionality in the Windows Recovery Environment (WinRE). Microsoft has acknowledged these problems and plans to release an emergency fix within 48 hours. A regression in the kernel-mode HTTP server (HTTP.sys) is responsible for the localhost connectivity issues, particularly impacting Internet Information Services (IIS). Users are advised against seeking online troubleshooting solutions, as they have proven ineffective, and some have found risky temporary workarounds.
Winsage
October 19, 2025
The Windows Recovery Environment (RE) has become ineffective for many users due to a bug introduced in the October build of Windows 11 (KB5066835), which disables USB keyboards and mice in the recovery interface. Microsoft has acknowledged the issue and is working on a fix. Users with older PS/2-connected peripherals are not affected by this glitch. The bug impacts various versions of Windows 11 and has raised concerns among IT professionals, as it hinders critical system repairs.
Winsage
August 20, 2025
Microsoft released emergency patches, known as "out-of-band" updates, to address critical issues with its operating systems. The updates include KB5066189 for Windows 11 versions 23H2 and 22H2, KB5066188 for Windows 10 versions 22H2 and 21H2, and KB5066187 for Windows 10 LTSC 2019. These updates fix problems caused by the August 2025 security update, which led to installation failures (error code 0x8007007F) and disrupted reset and restore functionalities on Windows devices. The updates are available through Windows Update, but users must manually select and install the appropriate patch.
Winsage
August 15, 2025
Microsoft has acknowledged issues with the August security update for Windows 11, which may fail to install for some users, particularly affecting enterprise users. The error code associated with this issue is 0x80240069, and Microsoft has released an emergency update that will be automatically delivered through Windows Update. Administrators can also manually download the 'KB5063878 250814_00551 Known Issue Rollback' policy. Microsoft is testing another patch to address the installation failure and is committed to providing a resolution in a future update.
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