Microsoft

Microsoft open-sources tools for designing and testing AI agents

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Microsoft open-sources tools for designing and testing AI agents 2026-05-21 at 19:15 By Zeljka Zorz Microsoft has open-sourced two tools aimed at bringing security discipline to AI agent development: Clarity, a structured design review tool, and RAMPART, a continuous testing framework. The release comes from Microsoft’s AI Red Team, the company’s internal unit that stress-tests […]

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Microsoft Defender vulnerabilities exploited in the wild (CVE-2026-41091, CVE-2026-45498)

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Microsoft Defender vulnerabilities exploited in the wild (CVE-2026-41091, CVE-2026-45498) 2026-05-21 at 14:22 By Zeljka Zorz Attackers are exploiting two Microsoft Defender vulnerabilities (CVE-2026-41091 and CVE-2026-45498), Microsoft acknowledged and CISA confirmed by adding them to its Known Exploited Vulnerabilities catalog. The vulnerabilities CVE-2026-41091 allows for local privilege elevation (LPE), and is caused by the Microsoft Malware

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Microsoft Patches Exploited UnDefend and RedSun Defender Zero-Days

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Microsoft Patches Exploited UnDefend and RedSun Defender Zero-Days 2026-05-21 at 13:14 By Ionut Arghire The bugs could be exploited to elevate privileges to System or create a denial-of-service (DoS) condition. The post Microsoft Patches Exploited UnDefend and RedSun Defender Zero-Days appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original Source

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Microsoft provides mitigation for “YellowKey” BitLocker bypass flaw (CVE-2026-45585)

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Microsoft provides mitigation for “YellowKey” BitLocker bypass flaw (CVE-2026-45585) 2026-05-20 at 11:49 By Zeljka Zorz Microsoft is working on a fix for CVE-2026-45585 (aka “Yellowkey”), a vulnerability that can be used by attackers to bypass protections offered by BitLocker, the full-disk encryption feature built into Windows, and access users’ data. In the meantime, the company

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Microsoft Disrupts Malware-Signing Service Run by ‘Fox Tempest’ 

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Microsoft Disrupts Malware-Signing Service Run by ‘Fox Tempest’  2026-05-19 at 19:07 By Eduard Kovacs  Fox Tempest provides a service that cybercriminals use to distribute ransomware and other malware disguised as legitimate software. The post Microsoft Disrupts Malware-Signing Service Run by ‘Fox Tempest’  appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original

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New macOS infostealer impersonates Apple, Microsoft, and Google in a single attack chain

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New macOS infostealer impersonates Apple, Microsoft, and Google in a single attack chain 2026-05-19 at 15:35 By Sinisa Markovic A SHub macOS infostealer variant called Reaper impersonates Apple, Microsoft, and Google to trick users into executing malicious code, then targets browser data, password managers, and cryptocurrency wallets while establishing persistence for continued access, SentinelOne found.

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The AI backdoor your security stack is not built to see

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The AI backdoor your security stack is not built to see 2026-05-18 at 09:42 By Sinisa Markovic Enterprises deploying LLMs have spent the past two years building defenses around a reasonable assumption: malicious behavior leaves a trace in the input. Scan for suspicious tokens, filter unusual characters, watch for prompt injection patterns. New research from

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Unpatched Microsoft Exchange Server vulnerability exploited (CVE-2026-42897)

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Unpatched Microsoft Exchange Server vulnerability exploited (CVE-2026-42897) 2026-05-15 at 14:32 By Zeljka Zorz A critical cross-site scripting (XSS) vulnerability (CVE-2026-42897) in Microsoft Exchange Server is being exploited by attackers, Microsoft warned on Thursday. A permanent fix is still in the works. In the meantime, Microsoft provided temporary mitigations. About CVE-2026-42897 CVE-2026-42897 affects on-premises versions of

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Microsoft turns Copilot Studio into an AI agent control center

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Microsoft turns Copilot Studio into an AI agent control center 2026-05-14 at 18:25 By Anamarija Pogorelec The Microsoft Copilot Studio April 2026 updates improve visibility and governance for admins and expand workflow capabilities for managing agents. Copilot surfaces agent status in the authoring experience, giving admins insight into each agent’s security and protection posture. Customers

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Microsoft’s WinUI agent plugin trims token use by over 70% during development

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Microsoft’s WinUI agent plugin trims token use by over 70% during development 2026-05-14 at 18:25 By Sinisa Markovic Microsoft published a plugin on May 13 that lets GitHub Copilot CLI and Claude Code drive the full WinUI 3 development cycle, from project scaffolding through signed MSIX packaging. The WinUI agent plugin ships one agent, eight

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Microsoft, Palo Alto Networks Find Many Vulnerabilities by Using AI on Their Own Code

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Microsoft, Palo Alto Networks Find Many Vulnerabilities by Using AI on Their Own Code 2026-05-13 at 19:01 By Eduard Kovacs Microsoft’s MDASH discovered 16 of the Patch Tuesday vulnerabilities, and Palo Alto used Mythos to find dozens of flaws.  The post Microsoft, Palo Alto Networks Find Many Vulnerabilities by Using AI on Their Own Code

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Microsoft May 2026 Patch Tuesday: Many fixes, but no zero-days

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Microsoft May 2026 Patch Tuesday: Many fixes, but no zero-days 2026-05-13 at 00:31 By Zeljka Zorz Microsoft has marked May 2026 Patch Tuesday by releasing fixes for 120+ CVE-numbered vulnerabilities, none of which (for a change) are actively exploited or have been publicly disclosed. Still, some deserve more consideration and should be addressed sooner than

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Microsoft Patches 137 Vulnerabilities

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Microsoft Patches 137 Vulnerabilities 2026-05-12 at 21:50 By Ionut Arghire Fresh security updates resolve critical flaws in Azure, Windows, Dynamics 365, and the SSO Plugin for Jira & Confluence. The post Microsoft Patches 137 Vulnerabilities appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original Source

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One keypress is all it takes to compromise four AI coding tools

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One keypress is all it takes to compromise four AI coding tools 2026-05-08 at 01:14 By Mirko Zorz Developers clone unfamiliar repositories all the time. Open-source projects, work from teammates, sample code from a tutorial, a library someone recommended on a forum. The convention is old and reasonable: you look at what’s inside before you

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Microsoft Warns of Sophisticated Phishing Campaign Targeting US Organizations

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Microsoft Warns of Sophisticated Phishing Campaign Targeting US Organizations 2026-05-05 at 17:45 By Eduard Kovacs The malicious emails claim to contain a conduct report and lure victims to a Microsoft phishing website that leverages AitM. The post Microsoft Warns of Sophisticated Phishing Campaign Targeting US Organizations appeared first on SecurityWeek. This article is an excerpt

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AI is speeding up nation-state cyber programs

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AI is speeding up nation-state cyber programs 2026-04-24 at 08:40 By Mirko Zorz Im this Help Net Security interview, Kaja Ciglic, Senior Director, Cybersecurity Policy and Diplomacy at Microsoft, discusses how nation-state cyber programs have changed over three years. Cyber has become a core instrument of state power, integrated with military, economic, and diplomatic tools.

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OneDrive updates focus on AI, access control, and compliance

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OneDrive updates focus on AI, access control, and compliance 2026-04-22 at 13:48 By Anamarija Pogorelec Microsoft OneDrive’s recent updates focus on improving intelligence, collaboration, and administrative control. “Last year, we made a promise: your files should work for you, not the other way around. That meant reimagining OneDrive not just as a place to store

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Researcher drops two more Microsoft Defender zero-days, all three now exploited in the wild

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Researcher drops two more Microsoft Defender zero-days, all three now exploited in the wild 2026-04-17 at 14:32 By Zeljka Zorz The security researcher who earlier this month published a proof-of-concept (PoC) exploit for a zero-day privilege escalation vulnerability in Microsoft Defender is back with two more. The first, dubbed “RedSun,” is another privilege escalation flaw

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Microsoft Paid Out $2.3 Million at Zero Day Quest 2026 Hacking Contest

AI, bug bounty program, Cloud, hacking competition, Microsoft, Vulnerabilities, vulnerability, Zero Day Quest /

Microsoft Paid Out $2.3 Million at Zero Day Quest 2026 Hacking Contest 2026-04-16 at 15:03 By Eduard Kovacs Researchers found more than 80 high-impact cloud and AI vulnerabilities during the event, which had a $5 million prize pool. The post Microsoft Paid Out $2.3 Million at Zero Day Quest 2026 Hacking Contest appeared first on

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Windows is getting stronger RDP file protections to fight phishing attacks

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Windows is getting stronger RDP file protections to fight phishing attacks 2026-04-16 at 01:19 By Sinisa Markovic Microsoft has introduced new Windows protections starting with the April 2026 security update to reduce phishing attacks that abuse Remote Desktop (.rdp) files. With these updates, the Remote Desktop Connection app displays stronger warning dialogs before a connection

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