All news with #patch tuesday tag

🛡️ Microsoft released its June 2026 Patch Tuesday addressing 200 vulnerabilities, including three publicly disclosed zero-day flaws. The update includes 33 Critical issues — 28 of them remote code execution — and a broad mix of elevation of privilege, information disclosure, spoofing, and DoS bugs. Microsoft also provided mitigations and new settings, such as MaxHeadersCount for HTTP/2, and highlighted that some fixes were issued earlier for cloud and Edge components.

🛡️ Microsoft released its June 2026 Patch Tuesday addressing 200 vulnerabilities, including five publicly disclosed zero-days and one actively exploited flaw. The updates cover 33 Critical issues, with numerous RCE, elevation of privilege, information disclosure, and other vulnerabilities across Windows, Exchange, BitLocker, HTTP/2 and more. Microsoft also provided mitigations and new settings such as a MaxHeadersCount registry key for HTTP/2.

🔔 Microsoft released Windows 11 cumulative updates KB5094126 and KB5093998 for 25H2/24H2 and 23H2 on Patch Tuesday, delivering security fixes, bug patches, and new features. The updates change build numbers and add capabilities like Shared Audio and expanded Xbox mode, plus Task Manager NPU visibility and Multi‑App Camera. Install via Settings > Windows Update or the Microsoft Update Catalog for the June 2026 security rollup.

🔒 The Centre for Cybersecurity Belgium (CCB) warned that threat actors are exploiting a recently patched critical Windows Netlogon vulnerability (CVE-2026-41089). Microsoft patched the stack-based buffer overflow during May 2026 Patch Tuesday, which can allow unauthenticated remote code execution on domain controllers. The CCB urged administrators to apply updates immediately, noting a CVSS score of 9.8, while Microsoft has not yet confirmed active exploitation.

🔧 Microsoft has fixed a known issue that caused installation failures and 0x800f0922 errors for the May 2026 Windows 11 security update (KB5089549). The failures were triggered by insufficient free space on the EFI System Partition (ESP), causing updates to rollback during reboot at roughly 35–36% completion. The fix is included in the May 26, 2026 preview cumulative update (KB5089573) and will be made available broadly in the June Patch Tuesday updates, with mitigation options for enterprises via Known Issue Rollback or Group Policy.

🛡️ CISA has mandated U.S. federal agencies to patch an actively exploited SQL injection vulnerability in the Drupal CMS (CVE-2026-9082) by the specified deadline. Discovered by Google/Mandiant researcher Michael Maturi, the flaw affects Drupal's database abstraction API and allows unauthenticated SQL injection against PostgreSQL-backed sites. The Drupal team labelled the bug highly critical and released fixes after observing exploitation in the wild; Shadowserver reports nearly 670 exposed installations. CISA added the issue to its KEV Catalog and urged all organizations to apply vendor mitigations immediately.

🔔 Microsoft confirmed a known issue where domain controller discovery may fail on Windows Server 2016 after installing the KB5087537 May 2026 security update. The problem affects only systems whose hostnames are exactly 15 characters long, causing DCLocator calls to return ERROR_INVALID_PARAMETER. This can prevent applications and admin tools from locating domain controllers and may disrupt administrative scenarios such as DFS Namespace management.

🔧 Microsoft warns that Windows Update may fail on restricted networks after installing the January 2026 optional preview updates, producing error code 0x80010002. Affected devices may download the February security update but then fail to retrieve March or later releases via the Windows Update settings. The issue stems from tightened download timeout requirements and does not affect installation capability. Admins can apply Known Issue Rollback (KIR) group policies and restart devices to work around the problem.

⚠️ Some Windows 11 devices fail to complete Microsoft’s May Security Update when the EFI System Partition (ESP) has roughly 10MB or less free, producing the rollback message "Something didn’t go as planned. Undoing changes." Microsoft suggested a registry tweak or rollback while consultants warn this leaves endpoints unpatched and undermines trust in update validation. Experts recommend resizing partitions, testing fixes, and adding ESP checks to endpoint health.

🔒 Microsoft released patches for 138 vulnerabilities across its product portfolio, including 30 Critical and 104 Important flaws, with none currently listed as publicly known or under active attack. The update spans privilege escalation, remote code execution, information disclosure, and spoofing issues, and includes a recently patched AMD CPU isolation flaw (CVE-2025-54518). Notable high-risk fixes include CVE-2026-41096 (Windows DNS heap overflow) and several Critical issues in Azure, Dynamics 365, Hyper-V, and Office. Administrators are urged to prioritize updates, rotate Secure Boot certificates before the June 26, 2026 deadline, and follow mitigation guidance such as reducing internet exposure and enforcing MFA.

🔒 Microsoft released its May Patch Tuesday fixing 120 CVEs, including 17 critical flaws. The update addresses 14 RCEs, two elevation of privilege bugs and one information disclosure issue, with the majority of fixes covering EoP and RCE types. Microsoft credited its WARP team and an agentic AI system, MDASH, with discovering 16 of the issues. Administrators are urged to prioritize high-risk fixes such as CVE-2026-41089.

🔒 Microsoft’s May Patch Tuesday addresses 118 vulnerabilities, including critical Windows Server flaws in Netlogon (CVE-2026-41089) and the DNS Client (CVE-2026-41096), plus a severe RCE in Microsoft Dynamics 365 On-Premises. Cloud services such as Azure and Microsoft Teams have already been updated, but on-prem and endpoint administrators must prioritize OS and application patches. Analysts recommend additional protections like network segmentation, access restrictions, and monitoring. Also note a mandatory Secure Boot certificate rotation before June 26 and multiple high‑risk SAP and Oracle updates.

🔒 Microsoft’s May Patch Tuesday updates address at least 118 security flaws across Windows and other products, including 16 rated critical. This release is notable as the first Patch Tuesday in nearly two years without fixes for known exploited zero-days or previously disclosed vulnerabilities. Other major vendors — Apple, Google, Mozilla and Oracle — have accelerated patch cadences after collaborative AI evaluations. Administrators are advised to apply updates promptly and back up data before upgrading.

🔒 Microsoft released its May 2026 Patch Tuesday update addressing 137 vulnerabilities, of which 31 are rated critical. Microsoft reports no observed active exploitation in the wild, though several critical RCE and local code-execution flaws affect Windows services, Office, Azure, SharePoint, and mobile Office. Talos has published new Snort 2 and Snort 3 rule sets to detect many exploitation attempts and recommends immediate patching and signature updates.

🔒 Microsoft released Windows 11 cumulative updates KB5089549 (25H2/24H2) and KB5087420 (23H2) as the May 2026 Patch Tuesday rollout. The mandatory updates address 120 security vulnerabilities, deliver bug fixes, and introduce features such as desktop Xbox mode, expanded File Explorer archive support, haptic input signals, and Drop Tray. They also improve Windows Hello, taskbar reliability, printing, and add an optional registry control to harden batch-file processing. Install via Settings > Windows Update or the Microsoft Update Catalog.

🔔 Today's May 2026 Patch Tuesday from Microsoft delivers security updates addressing 120 distinct vulnerabilities, including 17 rated Critical. The release corrects multiple remote code execution, elevation-of-privilege, information disclosure, denial-of-service, spoofing, and security feature bypass flaws across Windows, Office, SharePoint, and developer tools. Notable patches close dangerous RCE vectors in Microsoft Office (Word, Excel, PowerPoint) that can be exploited via malicious attachments or the preview pane, and key fixes include Windows GDI EMF parsing, SharePoint server RCE, and a Windows DNS Client RCE. Administrators are strongly advised to prioritize and deploy updates promptly to reduce exposure.

⚠️ Microsoft and CISA have warned that a Windows shell spoofing vulnerability (CVE-2026-32202) is being actively exploited and has prompted a CISA directive requiring federal agencies to patch by May 12. Microsoft says exploitation can expose sensitive data though it does not allow full system takeover. Security experts caution the situation was aggravated by an incomplete earlier fix for CVE-2026-21510, creating a patch gap between vendor updates and organizational deployment. CISOs face a difficult balance between rapid remediation and careful testing to avoid service disruption, and are urged to apply interim mitigations where possible.

⚠ Microsoft confirmed a display bug causing newly introduced Windows security warnings to render incorrectly when opening Remote Desktop (RDP) files. The issue affects all supported Windows releases updated in April 2026 (including Windows 11 KB5083768 & KB5083769, Windows 10 KB5082200, and Windows Server KB5082063) and appears when multiple monitors use different scaling settings, producing overlapping text and misplaced buttons. These dialogs — deployed to warn users about unsigned or unverified RDP files and to show resource redirection settings — can become difficult or impossible to interact with until Microsoft provides a fix.

⚠️After installing the April 2026 Windows security update (KB5082063), some non‑Global Catalog domain controllers configured with Privileged Access Management (PAM) may experience Local Security Authority Subsystem Service (LSASS) crashes during startup. Affected servers can enter repeated reboot loops, disrupting authentication and directory services and potentially rendering domains unavailable. Microsoft is investigating and advises administrators to contact Microsoft Support for Business for mitigation options until a permanent fix is released.

⚠️ Microsoft is investigating reports that the April KB5082063 cumulative security update fails to install on some Windows Server 2025 systems, with affected devices returning 0x800F0983 installation errors. The company says it is monitoring diagnostic telemetry and observed recurring failures after the April 14, 2026 release. A limited number of servers may also boot into BitLocker recovery and request recovery keys, a condition Microsoft says typically affects enterprise-managed configurations. Microsoft is continuing its investigation and will share additional details as they become available.