Microsoft Patches 200 Vulnerabilities

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. 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. 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