lsass

Microsoft’s December preview cumulative, KB5070311, set out to finish a long‑running task—bring a truly cohesive dark mode to File Explorer—only to introduce a conspicuous rendering regression that briefly flashes a bright white window in place of the expected dark interface. The package is an...

Microsoft pushed a substantial Release Preview package into Insiders’ hands this week: the November “Week D” preview (packaged as KB5070311) advances Windows 11 24H2 and 25H2 builds to 26100.7309 and 26200.7309 respectively and bundles a mix of Copilot+ hardware-gated improvements, visible UI...

Microsoft has released the November 2025 non‑security preview update for Windows 11 (KB5070311), a Release Preview flight that delivers focused UI polish, device-specific Copilot+ refinements, and a reliability fix for an LSASS instability — and administrators should treat it as an optional...

Microsoft pushed a focused Release Preview package on December 1, 2025 — KB5070311 — that updates Windows 11 on both the 24H2 and 25H2 servicing tracks (OS Builds 26100.7309 and 26200.7309) and pairs modest but widely useful UI polish with device‑gated Copilot+ improvements and an important...

Microsoft has released Windows 11 Builds 26100.7296 and 26200.7296 (packaged as KB 5070311) to Insiders in the Release Preview Channel, bringing a mix of Copilot+ PC–specific AI features, wide-ranging polish across File Explorer and Settings, and a non-security stability fix for the Local...

If you’ve opened Task Manager and spotted lsass.exe running, it’s not a casual background program — it’s the Local Security Authority Subsystem Service, the core Windows component that enforces authentication and security policy, and yes, it’s supposed to be there — but attackers sometimes...

Microsoft’s security advisory for CVE-2025-53809 warns that improper input validation in the Windows Local Security Authority Subsystem Service (LSASS) can be abused by an authorized attacker to cause a denial of service (DoS) over a network, putting authentication services and domain...

Microsoft’s advisory for CVE-2025-54895 warns that an integer overflow or wraparound in the SPNEGO Extended Negotiation (NEGOEX) security mechanism can be triggered by an authorized local actor to elevate privileges, turning a legitimate local account into a pathway to SYSTEM-level control if...

Title: New LSASS DoS (CVE-2025-53716) — What admins need to know now By WindowsForum.com security desk — August 12, 2025 Summary A null-pointer dereference vulnerability in the Windows Local Security Authority Subsystem Service (LSASS) — tracked as CVE-2025-53716 in Microsoft’s Security Update...

SafeBreach Labs’ disclosure of four newly discovered Windows denial-of-service (DoS) flaws — and the novel “Win‑DDoS” technique they describe for turning exposed domain controllers into DDoS amplifiers — forces a hard look at how organizations harden their identity plane, patch critical servers...

A new class of Windows denial-of-service attacks revealed at DEF CON has forced a hard reckoning for enterprise defenders: vulnerabilities in LDAP handling can not only crash individual servers, they can be chained into zero-click attack flows that target Domain Controllers (DCs) and potentially...

Microsoft has released an out-of-band update, KB5064489, for Windows 11 version 24H2, bringing the OS build to 26100.4656. This update addresses critical issues that necessitated immediate attention outside the regular update schedule. Key Improvements and Fixes: Security Enhancements: The...

Microsoft’s strategy for evolving Windows 11 is no longer marked by the headline-grabbing features that dominated past releases. Instead, their latest Dynamic updates—namely KB5060614 and KB5059693—focus on fine-tuning the OS’s setup and recovery processes. While these updates aren’t likely to...

Few updates in Windows ecosystems are as silently critical—and often misunderstood—as the so-called "Dynamic Updates." Last week, Microsoft quietly pushed out two new Dynamic Update packages for Windows 11 24H2 and Windows Server 2025: KB5060614 (Setup Dynamic Update) and KB5059693 (Safe OS...

Microsoft’s swift release of an emergency out-of-band update aimed at fixing the notorious BitLocker recovery issue in Windows 10 marks another chapter in the operating system’s complex ongoing relationship with hardware security and enterprise reliability. For countless administrators and...

The cybersecurity landscape is always evolving, and recently a new vulnerability has caught the attention of security experts and Windows users alike: CVE-2024-49126. This Remote Code Execution vulnerability specifically affects the Local Security Authority Subsystem Service (LSASS) in Windows...

I see it relates to DCOM Default Authentication Level, which has in total, 7 fields in the Component Services Windows admin tool. That is in this order, from top of the list to the bottom as it appears; Default, None, Call, Connect, Packet, Packet integrity and Packet Privacy. I only see one...

Hello, WindowsForum community! There's exciting news for Windows 11 enthusiasts and insiders: Microsoft has just released Windows 11 Build 22000.1879 (KB 5025298) to the Release Preview Channel. Let's dive into the key updates and improvements this latest build brings. Key Improvements and...

Hi all, I have been searching for some technical post to understand why LSASS can't be deactivated. Okay, it is responsible for enforcing the security policy on the system, but I want some deep sight why the system restarts after deactivate it. Thanks!

Severity Rating: Important Revision Note: V1.0 (January 10, 2017): Bulletin Published Summary: A denial of service vulnerability exists in the way the Local Security Authority Subsystem Service (LSASS) handles authentication requests. An attacker who successfully exploited the vulnerability...