All news with #security misconfiguration tag

🔒 Microsoft confirmed that Microsoft Defender Application Guard (MDAG) for Office will be removed from enterprise Office builds, with phased removal beginning in 2026 and final cut-offs through 2027. MDAG used Hyper‑V sandboxing to isolate malicious Office documents but incurred slower load times and carried sandbox escape risks. Microsoft advises enabling Attack Surface Reduction (ASR) rules and Windows Defender Application Control (WDAC), and reviewing any automation, workflows, or SIEM integrations that depended on MDAG’s isolation logs.

🏛 Thieves brazenly used a furniture elevator to access a second‑floor window and stole historic jewels worth about €88 million from display cases at the Louvre in October 2025. French authorities say the alarms on the affected window and cases functioned as intended, but the theft prompted a comprehensive security review and urgent recommendations for new governance, extra perimeter cameras, and updated protocols. Confidential audits cited by Libération document chronic IT weaknesses since 2014 — systems running Windows 2000 and weak password hygiene, including a video server reportedly protected by the password "LOUVRE".

⚠️Microsoft says installing the October 2025 updates can cause some Windows 10 systems with active coverage to display an incorrect "Your version of Windows has reached the end of support" message in Windows Update settings. The cosmetic issue affects Windows 10 Enterprise LTSC 2021, Windows 10 IoT Enterprise LTSC 2021, and Windows 10 22H2 devices enrolled in ESU. Microsoft has deployed a cloud configuration update to correct the message automatically, but devices that are offline or block dynamic updates may not receive it. Administrators can use Known Issue Rollback (KIR) by setting the KB5066791 251020_20401 value to Disabled to remove the alert on managed systems until a permanent fix ships in a future Windows update.

🏛 The Louvre has struggled for more than a decade with outdated software and unsupported Windows systems that control critical security infrastructure, French reports say. Audits in 2014 and 2017 found workstations running Windows 2000 and Windows XP, along with a video server still on Windows Server 2003 and weak, hard-coded passwords on surveillance applications. Procurement records also list multiple Thales systems as "software that cannot be updated." Authorities ordered governance and security reforms after a recent jewelry theft, though there is no indication the IT issues directly enabled that burglary.

🔒 Microsoft has updated File Explorer to disable the preview pane by default for files downloaded from the Internet or marked with the Mark of the Web. The change, included in Windows security updates released on and after October 14, 2025, is designed to block exploits that can leak NTLM hashes when previewed documents reference external resources. When preview is blocked, File Explorer shows a warning and users can manually unblock trusted files via Properties > Unblock or add the location to Trusted sites/Local intranet; a sign-out may be required for the change to take effect.

⚠ After installing the October 14, 2025 security update KB5066835, USB-wired mice and keyboards do not function in the Windows Recovery Environment (WinRE), Microsoft confirmed. The devices continue to operate normally inside the Windows OS, but WinRE navigation is blocked, affecting Windows 11 (24H2, 25H2) and Windows Server 2025. Microsoft is working on a fix expected in the coming days; meanwhile users can rely on Bluetooth peripherals or legacy PS/2 input devices as a workaround.

🔍 Matt Kiely of Huntress Labs urges Microsoft 365 administrators to audit OAuth applications across their tenants and provides a pragmatic starting tool, Cazadora. The research shows both abused legitimate apps (Traitorware) and bespoke malicious apps (Stealthware) can persist for years and that Azure’s default user-consent model enables these abuses. Operators should check Enterprise Applications and Application Registrations for suspicious names, anomalous reply URLs (notably a localhost loopback with port 7823), and other anomalous attributes, then take remediation steps.

⚠️ Microsoft’s October Windows 11 updates (notably KB5066835 and the September preview KB5065789) have disrupted HTTP/2 connections to localhost (127.0.0.1), preventing local services and developer tools from completing requests. Users report errors such as "ERR_CONNECTION_RESET" and "ERR_HTTP2_PROTOCOL_ERROR" when applications attempt to connect to the loopback interface. Affected software includes Visual Studio debugging, SSMS Entra ID authentication, and Duo Desktop; community workarounds include disabling HTTP/2 via Registry entries or uninstalling the problematic updates.

🔒 Amazon Elastic Container Service (Amazon ECS) now lets you run Firelens containers as a non-root user by specifying a numeric user ID in the user field of your Task Definition. Running Firelens as non-root reduces the potential attack surface and helps meet security and compliance requirements, including checks surfaced by AWS Security Hub. This capability replaces the previous default of "user": "0" and is available in all AWS Regions. See the Firelens documentation for configuration details.

⚠️ The article warns that unmonitored JavaScript on e-commerce sites is the single biggest holiday security risk, enabling attackers to steal payment data while server-side defenses like WAFs and intrusion detection systems remain blind. It reviews major 2024 incidents, including the Polyfill.io and Cisco Magecart campaigns, and highlights a dramatic uptick in attacks during peak shopping windows. Recommended mitigations emphasize closing visibility gaps with real-time client-side monitoring, maintaining strict third-party script inventories, and deploying Content Security Policy (initially in report-only mode) using nonces rather than weakening directives.

🔒 This article catalogs 15 frequently overlooked security blind spots that quietly increase organizational risk across six domains: time & telemetry, identity & edge, configuration & crypto, DNS & web trust, cloud & SaaS sprawl, and software supply chain & recovery readiness. It explains how mundane issues — NTP drift, orphaned DNS records, default IoT credentials, stale backups — become high-impact failures. The piece recommends immediate inventories, enforced baselines and a 90-day action plan to measure and close these gaps, and highlights metrics to track such as log coverage, patching cadence and backup restore success.

🔒 Microsoft is removing further methods that allow creating local accounts and bypassing the Microsoft account requirement during Windows 11 setup. The change appears in Windows 11 Insider Preview Build 26220.6772 (KB5065797) on the Dev Channel and is expected to reach production releases. Microsoft said it will remove known mechanisms in the OOBE experience because they can skip critical setup screens and leave a device not fully configured. Going forward, OOBE will require internet access and a Microsoft account to complete setup.

🔐 The 2025 State of Cloud Security Report from Fortinet and Cybersecurity Insiders highlights how accelerating cloud adoption and a widespread cybersecurity skills shortage are expanding organizational risk across SaaS, APIs, and hybrid environments. Many incidents result from human error — misconfigurations, exposed APIs, and overprivileged accounts — rather than sophisticated targeted attacks. The post recommends five practical measures, including embracing shared responsibility, enforcing MFA and least privilege, integrating security into CI/CD, automating configuration management, and monitoring SaaS and APIs, and stresses that tools must be paired with user awareness and cultural change.

🔒 Microsoft will no longer display inline SVG images in Outlook for Web and the new Outlook for Windows; users will instead see blank spaces where those images would have appeared. The global rollout began in early September 2025 and is expected to complete by mid‑October 2025, with Microsoft estimating the change will affect less than 0.1% of images. SVG files sent as classic attachments will continue to be viewable from the attachment well to limit user disruption.

⚠️ Microsoft is addressing a logic bug in Microsoft Defender for Endpoint that causes some Dell devices' BIOS firmware to be incorrectly marked as outdated, prompting unnecessary update alerts to users. The company says a fix has been developed and is being prepared for deployment, but it has not disclosed the regions or number of customers affected. Microsoft also recently resolved macOS black screen crashes linked to a deadlock in the Apple enterprise security framework and has been correcting several anti-spam and machine-learning false positives impacting Teams and Exchange Online.

⚠️ Adobe warns that a performance optimization change to Adobe Analytics data collection introduced an ingestion bug on September 17, 2025 at 12:20 UTC that caused some organizations' tracking fields to be overwritten with values from other customers' streams. Adobe reverted the change on September 18 at 11:00 UTC, said the issue was not caused by malicious activity, and reported roughly 3–5% of collected rows were corrupted. Impacted channels include Data Feeds, Live Stream, scheduled reports, and downstream products; Adobe has instructed affected customers to immediately delete any data received during the incident window while engineering teams cleanse impacted datasets.

🔧 Microsoft says it has partially resolved an issue that caused DRM-protected video playback failures on Windows 11 24H2 systems after the August preview update (KB5064081) or later. Affected applications using Enhanced Video Renderer with HDCP enforcement or DRM for digital audio experienced freezes, black screens, and copyright protection errors. The September preview update KB5065789 contains fixes, though Microsoft warns some audio DRM problems may continue for certain applications.

🔒 Cloudflare describes recent security hardening applied to Cloudflare Workers, combining V8 runtime changes with CPU features to strengthen isolation of customer scripts. The post highlights use of memory protection keys (PKU) assigned per-isolate, adoption of V8's sandbox and compressed pointers to confine heap corruption, and custom memory placement to pack sandboxes efficiently. Together these mitigations improve defense-in-depth and reduce opportunities for cross-isolate data leaks.

🎬 Microsoft confirmed a known issue that prevents some apps from playing DRM-protected video content or from displaying and recording live TV on Windows 11 24H2 systems after installing the August non-security preview update (KB5064081) or later. Applications using Enhanced Video Renderer with HDCP enforcement or DRM for digital audio may encounter copyright protection errors, frequent playback interruptions, freezing, or black screens. The vendor is working on a fix that will be delivered in a future Windows update.

🔒 Microsoft 365 has become the central nervous system of modern business, and its market dominance has turned the platform into a lucrative target for attackers. With over 400 million paid seats and tightly integrated apps like Outlook, SharePoint, Teams and OneDrive, a single compromise can cascade across services. Organizations must close backup gaps, adopt zero trust, enforce MFA and deploy cross-application threat detection to reduce catastrophic exposure.