mitigation 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 4, 2026

Microsoft says some users can’t open the Teams desktop client

Microsoft is addressing an issue (TM1466820) causing delays or preventing some users from accessing the Microsoft Teams desktop client on Windows systems, acknowledged on Thursday at 16:45 EDT. Affected users may experience loading failures or delays of up to two minutes and are advised to use the web or mobile versions of Teams as a temporary workaround. Microsoft is analyzing service logs and telemetry data to identify the root cause and has contacted some affected users for more information. Additionally, there is a separate issue (TM1466659) affecting Mac users, preventing them from joining Teams calls and meetings, confirmed on Sunday at 08:32 EDT. Microsoft is reassessing the cause of this disruption. Earlier this year, Microsoft resolved an issue blocking some Teams Free users from chats and calls. The company also confirmed a bug causing crashes and launch failures for Teams and New Outlook users after recent Windows security updates. Furthermore, there is an ongoing Exchange Online issue affecting multiple mailboxes, resulting in "Server busy" errors and delays in email communications with external domains.

Winsage

September 4, 2026

Microsoft warns fake CAPTCHA is tricking Windows users into running malware

Microsoft has identified a new malware campaign called TerminalFix that uses fake CAPTCHA prompts to trick Windows users into executing malicious commands. This campaign is a variation of ClickFix attacks and employs deceptive pages that impersonate reputable services like Cloudflare. Instead of traditional CAPTCHA challenges, users are instructed to open PowerShell or Command Prompt and paste in commands, allowing attackers to execute complex scripts more easily. TerminalFix initiates a multi-stage intrusion, granting attackers persistent proxy access to the infected machine, which can lead to further exploitation of the company's network. The campaign relies on social engineering tactics, requiring user compliance with counterfeit verification instructions. Microsoft has released mitigation guidance, recommending restrictions on PowerShell access, monitoring for DLL sideloading, blocking outdated Flash plugins, and enabling cloud-delivered protection in Microsoft Defender Antivirus. The campaign poses significant risks to enterprise networks, but individual users should also be cautious about executing commands requested by websites.

Winsage

September 1, 2026

TerminalFix Attacks Use Fake CAPTCHAs To Secretly Hack Windows PCs

Microsoft Threat Intelligence has identified a new variant of the ClickFix malware campaign called "TerminalFix." This variant uses deceptive CAPTCHAs that mimic trusted services like Cloudflare and directs users to PowerShell or a command prompt, allowing for the execution of complex scripts. TerminalFix aims to orchestrate a multi-stage attack that provides attackers with persistent, network-level proxy access through the compromised host, potentially leading to significant data theft and malware propagation within unsecured enterprise networks. Recommendations for defense against TerminalFix include restricting access to PowerShell and Windows Run dialogs, monitoring for DLL sideloading indicators, blocking Flash plugins, and enabling cloud-delivered protection in Microsoft Defender Antivirus. The attacks primarily target enterprise environments rather than individual consumers.

Winsage

August 24, 2026

You don’t want this Sleepwalker backdoor on your Windows machine

Malware researcher Dominik Reichel has discovered a sophisticated Windows backdoor named Sleepwalker, which remains dormant in memory until activated by a specially crafted network packet. Sleepwalker uses a 23-instruction command language to execute tasks, including running code in memory and exfiltrating data. It activates through a proprietary activation packet that does not contain readable commands. The malware targets a VMware VMCI and disguises itself as Microsoft's dpapi.dll, mimicking its functions while redirecting calls to a non-existent file. Once it confirms its host process as ERAAgent.exe, it enters a dormant state to evade detection. Sleepwalker monitors for a specific pattern known as a magic packet to decrypt and interpret commands. Commands sent to it are encrypted with AES-256-CCM and must be read in a specific order. The backdoor includes functionalities for sending and concealing data, receiving tasks, and executing programs. Reichel has developed a toolkit to decode Sleepwalker’s bytecode and a mitigation guide for affected users. However, there are significant gaps in knowledge regarding the initial access method, victim identification, and the malware's operator.

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.

AppWizard

August 17, 2026

Mortal Shell 2 review: A monumental heavy metal sequel with the spirit of a ’90s PC game

Mortal Shell 2 features a tavern called The One Legged Wolf, where patrons gather amidst a chaotic environment, enjoying music from a lute-player. The game blends modern dark fantasy with humor and classic PC gaming elements, enhancing its predecessor's gameplay and lore. Players control the Harbinger, who can inhabit eight different Shells, each with unique abilities and skill trees. Combat mechanics have evolved to allow for a more aggressive playstyle without a stamina bar, offering various damage mitigation methods. The game includes an easy mode, the Slayer Seal, and a secret hard mode for different player preferences. Level design pays homage to classic gaming, with intricate dungeons and hidden passages. Despite some bugs and a focus on specific Shells, the game is praised for its creativity and engaging experience.

AppWizard

August 15, 2026

Here’s everything new in Android 17 QPR2 Beta 3 [Gallery]

The December release of Android 17 QPR2 is anticipated, with Beta 3 recently launched. It includes new features such as an app lock for enhanced security, a blur effect on the Pixel lock screen, customizable quick settings layout, and expanded dynamic color theming. Additionally, it introduces measures to combat call forwarding fraud, including API restrictions on call-forwarding codes and a new OS-level confirmation dialog for users. Non-call forwarding USSD requests remain unaffected. Various fixes and optimizations have also been implemented in this beta release. Compatible devices for installation include the Pixel 6a, Pixel 7 series, Pixel Tablet, and upcoming Pixel 9 series.

AppWizard

August 14, 2026

Threema messenger says DDoS attacks disrupted its service for two days

Threema experienced significant disruptions due to large-scale DDoS attacks, rendering the service inaccessible for several hours on Tuesday and causing intermittent outages on Wednesday morning. The attacks targeted both Threema and its Swiss colocation partner, Nine, with service being unavailable from 7:30 p.m. to 11:30 p.m. CEST on Tuesday. By 12:23 p.m. on Wednesday, normal operations were restored. The security of Threema's systems and user data remained intact despite the service availability issues. The nature of the attacks made mitigation challenging, as attackers modified their methods rapidly. Threema's status page faced issues during the outage, and communication was conducted via email and social media. In response, Threema is implementing specialized upstream DDoS protection and plans to enhance its status page to provide monitoring for future disruptions.