Windows Server 2025 Archives

Winsage

September 10, 2026

CVE-2026-85880 and CVE-2026-81963: Microsoft Patches Two Actively Exploited Windows Zero-Days

Microsoft's Patch Tuesday on September 8, 2026, addressed two critical Windows privilege escalation vulnerabilities: CVE-2026-85880 and CVE-2026-81963, both with a CVSS score of 7.8. CVE-2026-85880 is a heap-based buffer overflow in the Windows Advanced Local Procedure Call (ALPC), allowing attackers with low-privilege local access to escalate privileges to SYSTEM. CVE-2026-81963 involves improper link resolution in the Windows Update Stack, enabling similar privilege escalation. Both vulnerabilities require no user interaction and have been actively exploited prior to the patch release. CISA added them to its Known Exploited Vulnerabilities catalog on September 8, 2026, with a remediation deadline of September 22 for U.S. federal agencies. CVE-2026-85880 affects various Windows 10 and Server versions but excludes Windows 11 and Windows Server 2025. CVE-2026-81963 impacts newer Windows platforms, including Windows 11 and Windows Server 2025. Microsoft released security updates for both vulnerabilities on September 8, 2026, and organizations are advised to prioritize these updates. Security teams should monitor for signs of privilege escalation and unusual SYSTEM-level activities related to these vulnerabilities.

Winsage

September 9, 2026

Critical Windows BitLocker Flaw Sparks Urgent Patch

On September 8, 2026, Microsoft disclosed a security vulnerability identified as CVE-2026-69449, related to a heap-based buffer overflow in the Windows BitLocker component, allowing authorized attackers to execute code on compromised machines. The vulnerability is classified as CWE-122, and is assessed as “Exploitation Less Likely.” It affects Windows 10, Windows 11, and Windows Server versions from 2012 to 2025. The fixes are included in cumulative updates KB5124008, KB5124012, KB5122878, and KB5122871. No public disclosure or observed exploitation occurred before the patch's release. The flaw allows for remote code execution through in-network attacks, primarily posing a risk to insiders. Affected systems include various versions of Windows 10, Windows 11, and Windows Server, applicable to both x64 and ARM64 architectures. Administrators should verify installed build numbers to ensure updates have been applied. The advisory does not specify which BitLocker code path is affected or the nature of the input that reaches the vulnerable buffer.

Winsage

September 8, 2026

Msckey Cuts 25% Off Windows 11 & Office 2024 for Back to Work/School

Msckey has launched a Back to Work/School sale from August 27 to September 15, offering a 25% discount on all Microsoft software licenses with the code BTS25. The sale includes various products such as Windows operating systems, Office 2024 suite, and professional tools like Microsoft Project and SQL Server. Current prices during the sale include Windows 11 Education for .99, Windows 11 Home for .74, and Office 2024 Professional Plus for .99. Msckey ensures that all licenses are genuine, clearly labeled, and delivered via email within minutes. Customers can pay using multiple options and receive personalized support.

Tech Optimizer

September 3, 2026

Prolific Microsoft 0-day hunter drops CrowdStrike Falcon exploit PoC

Nightmare Eclipse, a security researcher known for identifying vulnerabilities in Microsoft products, has shifted focus to other vendors, revealing a zero-day vulnerability called FalconFlank that targets CrowdStrike’s Falcon endpoint security platform. FalconFlank is a privilege escalation vulnerability that exploits the Microsoft Office malicious macros remediation feature within CrowdStrike Falcon. CrowdStrike is investigating the claims and advises customers to disable the Microsoft Office File Suspicious Macro Removal Windows policy setting while assuring them of continued protection through Cloud Anti-malware settings. The exploit works on fully updated Windows 11 25H2 and Windows Server 2025 systems running CrowdStrike Falcon with Optimal Protection enabled. Nightmare Eclipse has also discovered other vulnerabilities, including HardBreacher affecting Kaspersky’s endpoint antivirus and PrettyPrague in Gen Digital’s Avast antivirus, which allows attackers to dump the SAM database. Gen Digital is developing a patch for the Avast vulnerability, while Kaspersky has not commented. Additionally, Nightmare disclosed a memory corruption zero-day vulnerability in Nvidia, named GreenSection, which causes system crashes.

Tech Optimizer

August 26, 2026

How to Protect Against Ransomware: 13 Steps [2026]

Global ransomware attacks increased by 0.8% quarter-over-quarter in Q2 2026. The group Qilin has 279 confirmed victims, maintaining its position as the leading threat actor for four consecutive quarters. The rival group The Gentlemen saw a 62% increase in victims, reaching 269. Checkpoint Research's report indicates a shift in the ransomware landscape, challenging the narrative of declining attacks. IBM's analysis shows breaches within supply chains and third-party vendors have quadrupled over the past five years. Effective ransomware protection requires administrative access to endpoints, firewalls, and backup systems, along with specific software versions and tools. The 3-2-1-1-0 backup strategy is recommended, emphasizing offline, immutable backups. Organizations should implement multi-factor authentication (MFA) across all access points and actively patch known vulnerabilities. Network segmentation is crucial to limit ransomware spread, and canary files can provide early warnings of attacks. Regular phishing simulations and a well-documented incident response plan are essential for preparedness.

Winsage

August 25, 2026

Microsoft: August updates break printing, PDF export in WPF apps

Microsoft has acknowledged a significant issue with the .NET Framework updates from August 2026, causing disruptions in printing and PDF export functionalities in certain applications, particularly those using the Windows Presentation Foundation (WPF) UI framework. After installing the update, some WPF applications may encounter a System.IO.FileFormatException when printing or generating PDF/XPS content with specific fonts, including Calibri. This issue affects various platforms, including Windows 10, Windows 11, and Windows Server editions from 2012 to 2025. Microsoft has provided a temporary workaround involving the Switch.MS.Internal.TtfDelta.DisableCmapAndSbitOverflowProtection AppContext switch, but cautions that it may expose systems to vulnerabilities. This situation is reminiscent of a similar incident in February 2021, where WPF applications and Visual Studio experienced crashes after Windows 10 cumulative updates. Additionally, on the same day, Microsoft offered a workaround for another issue caused by Windows 11 updates that led to crashes in certain games.

Winsage

August 20, 2026

ShieldBreak: The Windows Defender Zero-Day With No Patch — Detect It, Mitigate It, With Qualys

ShieldBreak, identified as CVE-2026-69414, is a zero-day vulnerability in the Microsoft Malware Protection Engine that allows low-privileged local attackers to escalate privileges to SYSTEM. The public proof of concept was released on August 12, 2026, and Microsoft recognized the CVE on August 14, 2026. No patch is currently available. ShieldBreak exploits an elevation-of-privilege vulnerability by manipulating file processing during the cloud-file hydration process in Microsoft Defender, allowing attackers to control processes with elevated privileges. The exploit is functional on Windows 11 25H2 and Windows Server 2025. Qualys VMDR can detect this vulnerability using a specific query, and organizations can use Qualys TruRisk™ Eliminate for mitigation until a patch is released.

Winsage

August 18, 2026

Microsoft Scrambles To Patch ShieldBreak Zero-Day Flaw In Windows Defender

A new exploit named ShieldBreak, developed by Nightmare-Eclipse, targets Microsoft Defender by allowing privilege escalation and bypassing previous security fixes related to the RoguePlanet vulnerability. ShieldBreak operates on Windows 11 25H2, its Canary channel, and Windows Server 2025, achieving a "100% success rate." Windows 10 may also be vulnerable, but the exploit is specifically designed for Windows 11. There is currently no patch for ShieldBreak, and users are advised to disable Microsoft Defender, implement two-factor authentication, and exercise caution with suspicious online activities. Malwarebytes has recommended its Premium Security antivirus as a temporary solution.

Winsage

August 18, 2026

CISA: Windows Task Host flaw now exploited by ransomware gangs

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) confirmed that ransomware gangs are exploiting a significant vulnerability in the Windows Task Host system, tracked as CVE-2025-60710. This high-severity flaw, affecting Windows 11 and Windows Server 2025, allows local attackers with basic user permissions to escalate their privileges to SYSTEM level. Microsoft patched this vulnerability in November 2025, but it poses a threat to unpatched devices. CISA added CVE-2025-60710 to its list of actively exploited vulnerabilities on April 13 and provided Federal Civilian Executive Branch agencies with a two-week window to secure their systems. CISA warns that such vulnerabilities are frequent attack vectors for malicious actors and urges organizations to apply mitigations or discontinue the use of affected products. Additionally, CISA noted that ransomware groups are also exploiting a Microsoft SharePoint remote code execution vulnerability (CVE-2026-45659), confirmed to be actively exploited in early July. Since November 2021, CISA has identified 383 actively exploited vulnerabilities across various Microsoft products, with 112 being used in ransomware attacks.

Winsage

August 17, 2026

Windows Server 2022 reaches end of mainstream support in 60 days

Microsoft has announced that the mainstream end date for Windows Server 2022 is set for October 13, 2026, after which it will enter extended support until October 14, 2031. Windows Server 2022 became generally available in September 2021 and is part of the Long-Term Servicing Channel (LTSC) offering, which guarantees a decade of support. Microsoft recommends upgrading to Windows Server 2025, which will be generally available in November 2024, and will reach its end of support on November 13, 2029, with five years of extended support until November 14, 2034. A free 180-day trial of Windows Server 2025 is available. Additionally, hotpatching for Windows Server 2022 will be extended until October 2027 for Datacenter: Azure Edition systems. The free Windows 10 Extended Security Updates (ESU) program has been extended by an additional year, and Windows 11 23H2 Enterprise and Education editions will end updates on November 10, 2026, with a recommendation to upgrade to Windows 11 25H2.