{"schema_version":1,"title":"Microsoft Outlook vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 7 vulnerabilities in Microsoft Outlook: 1 in the last 7 days and 3 in the last 90 days, 3 of them critical and 2 exploited in the wild. The most recent, CVE-2026-70125, was published on 23 September 2026.","url":"https://junglewise.ai/threats/technologies/outlook","json_url":"https://junglewise.ai/threats/technologies/outlook.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/outlook","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":3,"all_time":7,"critical":3,"exploited":2,"last_7_days":1,"last_30_days":3,"last_90_days":3,"last_365_days":4},"latest":[{"cve":"CVE-2026-70125","cvss":8.8,"epss":0.0044,"slug":"cve-2026-70125-microsoft-office-outlook-remote-code-execution-vulnerability","title":"Microsoft Office Outlook remote code execution","severity":"high","exploited":false,"published_at":"2026-09-23T23:18:12.51+00:00","url":"https://junglewise.ai/threats/cve-2026-70125-microsoft-office-outlook-remote-code-execution-vulnerability"},{"cve":"CVE-2026-80084","cvss":6.5,"epss":0.0092,"slug":"cve-2026-80084-microsoft-outlook-out-of-bounds-read-information-disclosure","title":"Microsoft Outlook out-of-bounds read information disclosure","severity":"medium","exploited":false,"published_at":"2026-09-08T18:20:50.743+00:00","url":"https://junglewise.ai/threats/cve-2026-80084-microsoft-outlook-out-of-bounds-read-information-disclosure"},{"cve":"CVE-2026-78509","cvss":9.8,"epss":0.0097,"slug":"cve-2026-78509-microsoft-outlook-heap-buffer-overflow-allows-remote-code","title":"Microsoft Outlook heap buffer overflow allows remote code execution","severity":"critical","exploited":false,"published_at":"2026-09-08T18:20:46.07+00:00","url":"https://junglewise.ai/threats/cve-2026-78509-microsoft-outlook-heap-buffer-overflow-allows-remote-code"},{"cve":"CVE-2026-42893","cvss":7.4,"slug":"cve-2026-42893-microsoft-m365-copilot-command-injection","title":"Microsoft M365 Copilot command injection","severity":"high","exploited":false,"published_at":"2026-05-12T18:17:26.343+00:00","url":"https://junglewise.ai/threats/cve-2026-42893-microsoft-m365-copilot-command-injection"},{"cve":"CVE-2024-21413","cvss":9.8,"slug":"cve-2024-21413-microsoft-outlook-improper-input-validation-vulnerability","title":"Microsoft Outlook Improper Input Validation Vulnerability","severity":"critical","exploited":true,"published_at":"2025-02-06T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2024-21413-microsoft-outlook-improper-input-validation-vulnerability"},{"cve":"CVE-2023-35311","cvss":8.8,"slug":"cve-2023-35311-microsoft-outlook-security-feature-bypass-vulnerability","title":"Microsoft Outlook Security Feature Bypass Vulnerability","severity":"critical","exploited":true,"published_at":"2023-07-11T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2023-35311-microsoft-outlook-security-feature-bypass-vulnerability"},{"cve":"CVE-1999-0519","cvss":7.5,"slug":"cve-1999-0519-microsoft-netbios-and-smb-null-or-default-password-on-network","title":"Microsoft NetBIOS and SMB null or default password on network shares","severity":"high","exploited":false,"published_at":"1997-01-01T05:00:00+00:00","url":"https://junglewise.ai/threats/cve-1999-0519-microsoft-netbios-and-smb-null-or-default-password-on-network"}],"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":1,"exploited":0,"vulnerabilities":2},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":1}],"related":[{"name":"Microsoft Windows","slug":"windows-","vulnerabilities":963,"url":"https://junglewise.ai/threats/technologies/windows-"},{"name":"Microsoft Windows 10","slug":"windows-10","vulnerabilities":588,"url":"https://junglewise.ai/threats/technologies/windows-10"},{"name":"Microsoft Windows 11","slug":"windows-11","vulnerabilities":493,"url":"https://junglewise.ai/threats/technologies/windows-11"},{"name":"Microsoft Windows Server 2012","slug":"windows-server-2012","vulnerabilities":293,"url":"https://junglewise.ai/threats/technologies/windows-server-2012"},{"name":"Microsoft Windows Server 2016","slug":"windows-server-2016","vulnerabilities":213,"url":"https://junglewise.ai/threats/technologies/windows-server-2016"},{"name":"Microsoft Windows Server 2019","slug":"windows-server-2019","vulnerabilities":211,"url":"https://junglewise.ai/threats/technologies/windows-server-2019"},{"name":"Microsoft Windows 11 24h2","slug":"windows-11-24h2","vulnerabilities":192,"url":"https://junglewise.ai/threats/technologies/windows-11-24h2"},{"name":"Microsoft Windows Server 2022","slug":"windows-server-2022","vulnerabilities":178,"url":"https://junglewise.ai/threats/technologies/windows-server-2022"},{"name":"Microsoft Edge","slug":"edge-chromium-based","vulnerabilities":167,"url":"https://junglewise.ai/threats/technologies/edge-chromium-based"},{"name":"Microsoft Windows 11 25h2","slug":"windows-11-25h2","vulnerabilities":161,"url":"https://junglewise.ai/threats/technologies/windows-11-25h2"},{"name":"Microsoft Windows 11 Version 26H1","slug":"windows-11-version-26h1","vulnerabilities":135,"url":"https://junglewise.ai/threats/technologies/windows-11-version-26h1"},{"name":"Microsoft Windows Server 2025","slug":"windows-server-2025","vulnerabilities":124,"url":"https://junglewise.ai/threats/technologies/windows-server-2025"}],"technology":{"hub":true,"name":"Microsoft Outlook","slug":"outlook","vendor":{"name":"Microsoft","slug":"microsoft","url":"https://junglewise.ai/threats/vendors/microsoft"},"aliases":[],"category":"email-client","homepage":"https://www.microsoft.com/en-us/microsoft-365/outlook/","description":"A personal information manager and email client used for communication and scheduling.","url":"https://junglewise.ai/threats/technologies/outlook"},"most_severe":[{"cve":"CVE-2024-21413","cvss":9.8,"slug":"cve-2024-21413-microsoft-outlook-improper-input-validation-vulnerability","title":"Microsoft Outlook Improper Input Validation Vulnerability","severity":"critical","exploited":true,"published_at":"2025-02-06T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2024-21413-microsoft-outlook-improper-input-validation-vulnerability"},{"cve":"CVE-2023-35311","cvss":8.8,"slug":"cve-2023-35311-microsoft-outlook-security-feature-bypass-vulnerability","title":"Microsoft Outlook Security Feature Bypass Vulnerability","severity":"critical","exploited":true,"published_at":"2023-07-11T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2023-35311-microsoft-outlook-security-feature-bypass-vulnerability"},{"cve":"CVE-2026-78509","cvss":9.8,"epss":0.0097,"slug":"cve-2026-78509-microsoft-outlook-heap-buffer-overflow-allows-remote-code","title":"Microsoft Outlook heap buffer overflow allows remote code execution","severity":"critical","exploited":false,"published_at":"2026-09-08T18:20:46.07+00:00","url":"https://junglewise.ai/threats/cve-2026-78509-microsoft-outlook-heap-buffer-overflow-allows-remote-code"},{"cve":"CVE-2026-70125","cvss":8.8,"epss":0.0044,"slug":"cve-2026-70125-microsoft-office-outlook-remote-code-execution-vulnerability","title":"Microsoft Office Outlook remote code execution","severity":"high","exploited":false,"published_at":"2026-09-23T23:18:12.51+00:00","url":"https://junglewise.ai/threats/cve-2026-70125-microsoft-office-outlook-remote-code-execution-vulnerability"},{"cve":"CVE-1999-0519","cvss":7.5,"slug":"cve-1999-0519-microsoft-netbios-and-smb-null-or-default-password-on-network","title":"Microsoft NetBIOS and SMB null or default password on network shares","severity":"high","exploited":false,"published_at":"1997-01-01T05:00:00+00:00","url":"https://junglewise.ai/threats/cve-1999-0519-microsoft-netbios-and-smb-null-or-default-password-on-network"},{"cve":"CVE-2026-42893","cvss":7.4,"slug":"cve-2026-42893-microsoft-m365-copilot-command-injection","title":"Microsoft M365 Copilot command injection","severity":"high","exploited":false,"published_at":"2026-05-12T18:17:26.343+00:00","url":"https://junglewise.ai/threats/cve-2026-42893-microsoft-m365-copilot-command-injection"},{"cve":"CVE-2026-80084","cvss":6.5,"epss":0.0092,"slug":"cve-2026-80084-microsoft-outlook-out-of-bounds-read-information-disclosure","title":"Microsoft Outlook out-of-bounds read information disclosure","severity":"medium","exploited":false,"published_at":"2026-09-08T18:20:50.743+00:00","url":"https://junglewise.ai/threats/cve-2026-80084-microsoft-outlook-out-of-bounds-read-information-disclosure"}],"generated_at":"2026-09-26T11:07:00.153785+00:00"}