Microsoft Patches 200 Vulnerabilities
Microsoft patches 200 vulnerabilities, including three publicly disclosed flaws.
Summary
Microsoft's June 2026 Patch Tuesday addresses approximately 200 vulnerabilities across its product suite. While none of the patched flaws appear to have been exploited in the wild, three were publicly disclosed beforehand. These include a denial-of-service vulnerability in Windows (CVE-2026-49160), a BitLocker security bypass (CVE-2026-50507) potentially linked to the 'YellowKey' exploit, and a privilege escalation bug in the Windows Collaborative Translation Framework (CVE-2026-45586). Microsoft has rated the exploitability of these three as 'more likely'.
Full text
Microsoft’s June 2026 Patch Tuesday updates fix roughly 200 vulnerabilities discovered in the company’s products. None of the flaws addressed this month appears to have been exploited in the wild, but three issues were publicly disclosed before Microsoft patched them. One of them is CVE-2026-49160, described as a denial-of-service (DoS) issue affecting Windows. This vulnerability is related to HTTP2/Bomb, an attack technique that could affect hundreds of thousands of websites, and which can be used to knock web servers offline in seconds. Another disclosed vulnerability is CVE-2026-50507, a Windows BitLocker security bypass that can allow an attacker with physical access to the targeted system to access encrypted data. The security hole may be related to YellowKey, one of the several exploits released by a researcher known online as Chaotic Eclipse and Nightmare Eclipse, who began leaking PoC code after a disagreement with Microsoft. Several of the exploits leaked by the researcher have been exploited in the wild. The third publicly disclosed vulnerability patched by Microsoft this month is CVE-2026-45586, a Windows Collaborative Translation Framework bug that can be exploited to elevate privileges to System. An anonymous researcher reported the weakness to the vendor.Advertisement. Scroll to continue reading. All three publicly disclosed issues have been assigned an ‘exploitation more likely’ exploitability assessment by Microsoft. Nearly 40 of the approximately 200 security holes addressed this month have a ‘critical’ severity rating. They affect Windows, Azure, Office, Outlook, Exchange, and AI tools, and their exploitation can lead to remote code execution, privilege escalation, and information disclosure. In addition to the vulnerabilities that are specific to Microsoft products, the tech giant published advisories for 360 issues affecting third-party components used by its software. Adobe’s latest Patch Tuesday updates fix more than 120 vulnerabilities. Related: Microsoft Tries to Calm Legal Threat Fears After Zero-Day Disclosure Backlash Related: How One Line of Code Put Billions of Microsoft Android App Downloads at Risk Related: Microsoft Patches Exploited UnDefend and RedSun Defender Zero-Days Written By Eduard Kovacs Eduard Kovacs (@EduardKovacs) is senior managing editor at SecurityWeek. He worked as a high school IT teacher before starting a career in journalism in 2011. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering. Daily Briefing Newsletter Subscribe to the SecurityWeek Email Briefing for the latest cybersecurity threats, trends, and expert insights. More from Eduard Kovacs Google Patches 5th Chrome Zero-Day Exploited in 2026WhatsApp Catches Spyware Firm NSO Defying No-Hacking Court OrderCybersecurity M&A Roundup: 26 Deals Announced in May 2026OpenAI Rolling Out ChatGPT Account Security ControlsMeta Says 20,000 Instagram Accounts Hacked via AI Tool AbuseNightclub Giant RCI Says Data Breach Affects 40,000 IndividualsCisco Warns of 7th SD-WAN Zero-Day Exploited in 2026Gemini Voice Assistant Hijacked via Messaging Notifications Latest News Adobe Patches 123 VulnerabilitiesAnthropic Launches Claude Fable 5: Mythos-Class AI With Cybersecurity Guardrails OpenSSL Patches High-Severity Vulnerability Found With AIClaude Mythos Turns N-Days Into N-Hours With Rapid Exploit CreationNew Platform Uses Cryptographic Invisibility to Protect AI-Built ApplicationsSAP Patches Critical NetWeaver, Commerce VulnerabilitiesOver 100 NPM, PyPI Packages Hit in New Shai-Hulud Supply Chain AttacksWill AI Kill the Bug Bounty Industry? Trending Daily Briefing NewsletterSubscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts. Webinar: Third-Party Risk in Practice June 4, 2026 Organizations are investing heavily in third-party risk management, but breaches, delays, and blind spots continue to persist. Join this live webinar as we examine the gap between how organizations think their third-party risk programs are performing and what’s actually happening in practice. Register Virtual Roundtable: CISO Forum 2026 Mid-Year Review June 10, 2026 Explore how attackers are using AI to scale threats and how security teams can respond with AI-driven defenses. Protecting against unmonitored use of generative AI (Shadow AI) in business units and building and enforcing AI governance frameworks. Register People on the MoveOpal Security has appointed CPO, CTO, VP of Field Engineering, VP of Marketing, and Head of Product and Solutions Marketing.The Department of the Air Force has appointed Ashley Devoto as Chief Information Officer.Bartley Richardson has been named Chief AI and Autonomous Systems Officer at CrowdStrike.More People On The MoveExpert Insights Everybody Is Vibe Coding But Nobody Told the Security Team AI-driven development is not something organizations can or should block. But it must be governed. (Danelle Au) The Zero-Knowledge Threat Actor and the End of Responsible Disclosure AI can help attackers generate malware, create malicious payloads, bypass simple security checks, and convert vague malicious intent into functional code. (Etay Maor) Raising the Cybersecurity Stakes: Ante up for the Agentic Era CISOs are now facing machine-speed attacks and asking, “How do I agent?” The industry must provide remediation at scale. (Nadir Izrael) Caught Off Guard: Securing AI After It Hits Production As enterprises rush AI projects into production, security teams are increasingly being forced into reactive mode. (Joshua Goldfarb) Cyber Resilience is the New Business Continuity Plan The organizations best prepared to face disruption are those that align security, continuity and risk management around what the business cannot afford to lose. (Steve Durbin) Flipboard Reddit Whatsapp Whatsapp Email
Indicators of Compromise
- cve — CVE-2026-49160
- cve — CVE-2026-50507
- cve — CVE-2026-45586