SharePoint Archives

Winsage

July 29, 2026

A Microsoft outage blocked Windows updates. Now a fix is being tested

On July 23rd, Microsoft experienced widespread outages affecting services such as Azure, Windows Update, and Microsoft 365 applications, which impeded users from installing important Windows 11 updates. In response, Microsoft is enhancing the Windows Update system, focusing on the Windows Update Orchestrator and Arbiter components. These changes are being tested in Windows Insider preview builds 26100.8968 and 26200.8968, which aim to improve update progress calculation and update clean-up logic for better system performance post-update.

Winsage

July 24, 2026

Microsoft shares some details on Azure outage that blocked Windows 11 update downloads

This week, Meta experienced a global outage affecting Facebook users, followed by Microsoft facing performance issues with its M365 services, including Teams and SharePoint. Microsoft also reported difficulties with Azure, impacting Windows 11 updates and the Microsoft Store. The issues began around 11:15 AM PST on July 23, 2026, with a notification to users about the Azure outage affecting Windows Update and related services. Microsoft initiated recovery efforts and by 1:45 PM PST, announced that the issues were resolved and services were restored. Currently, there are no ongoing issues reported on the Microsoft Service Health Status page, but the incident is documented on the Windows Release Health page.

Winsage

July 16, 2026

Nightmare Eclipse Drops ‘LegacyHive’ Windows Zero-Day

A security researcher known as Nightmare Eclipse has revealed a new unpatched vulnerability in Windows, named LegacyHive, which is a local privilege escalation flaw in the Windows User Profile Service. This vulnerability allows attackers to access and load user hives of other accounts, including administrators. Nightmare Eclipse has provided proof-of-concept exploit code that works on systems with Microsoft's July 2026 patches. The exploit initially did not require user credentials but now necessitates them for accessing other hives. Nightmare Eclipse has previously disclosed over half a dozen zero-day vulnerabilities affecting Microsoft products. Microsoft has not yet acknowledged the LegacyHive exploit.

Winsage

July 16, 2026

Microsoft’s July patches fix over 600 flaws, shattering last month’s record

Microsoft has released its July 2026 Patch Tuesday updates, addressing 570 new security vulnerabilities, bringing the total for the month to over 620. The cumulative count of vulnerabilities patched this year has reached 1,380, exceeding the total of 1,250 for the entire year of 2020. Over 400 vulnerabilities are related to various versions of Windows, and the Windows 10 Extended Security Update program has been extended until October 12, 2027. Notable vulnerabilities include CVE-2026-56155 in Active Directory Federation Services, which allows attackers to gain administrator rights, and several critical Remote Code Execution vulnerabilities, including CVE-2026-57092 in Hyper-V and CVE-2026-56190 in Remote Desktop Protocol. Microsoft has also patched 97 vulnerabilities in Office products, with 17 classified as critical RCE vulnerabilities, and four vulnerabilities in Exchange Server, including CVE-2026-55008. The latest Microsoft Edge update addresses 27 vulnerabilities related to Chromium, and a vulnerability in Minecraft Bedrock servers has been patched.

Winsage

July 15, 2026

Microsoft patches record 570 Windows security bugs with two exploited zero days

Microsoft released its July Patch Tuesday updates, addressing 570 security vulnerabilities in Windows, a record number for the company. This update includes three zero-day vulnerabilities, two of which have been exploited in real-world attacks, affecting Microsoft’s Active Directory and SharePoint, while the third concerns BitLocker encryption. The update also enhances Windows features, including changes to the Widgets app, improvements in File Explorer speed, refined Bluetooth connectivity, and a new feature allowing users to pause updates until a specific date. However, the update has been temporarily halted for certain Dell computers due to compatibility issues, with Microsoft working on a fix.

Winsage

July 15, 2026

Researcher Drops New Windows Zero-Day PoC Hours After Microsoft Patch Tuesday

Security researcher Chaotic Eclipse has released a proof-of-concept exploit called LegacyHive, which targets a vulnerability in the Windows User Profile Service. The exploit requires standard user credentials and a third username, potentially an administrator account. It can mount the target user hive in the current user classes root and is designed to reduce the risk of public exploitation. The exploit works across all supported desktop and server versions of Windows, including those updated with the July 2026 Patch Tuesday release. Microsoft is investigating the findings related to LegacyHive. Microsoft has patched 622 vulnerabilities, including two privilege escalation flaws in SharePoint Server (CVE-2026-56164, CVSS score: 5.3) and Active Directory Federation Services (CVE-2026-56155, CVSS score: 7.8), which are actively exploited threats. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has included these vulnerabilities in its Known Exploited Vulnerabilities catalog, requiring Federal Civilian Executive Branch agencies to implement fixes by specified deadlines. CISA has also noted active exploitation of several SharePoint Server vulnerabilities, including CVE-2026-32201, CVE-2026-45659, and CVE-2026-56164, which allow unauthorized access to vulnerable instances. CVE-2026-56164 enables attackers to send crafted network requests to access functions that should require authorization, leading to privilege escalation without prior authentication. Additionally, CVE-2026-55040 (CVSS score: 9.1) allows remote unauthenticated attackers to bypass authentication on a vulnerable SharePoint server, enabling unauthorized operations.