{"schema_version":1,"title":"Microsoft Exchange Online vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 5 vulnerabilities in Microsoft Exchange Online: 0 in the last 7 days and 3 in the last 90 days, 4 of them critical and 0 exploited in the wild. The most recent, CVE-2026-65801, was published on 20 August 2026.","url":"https://junglewise.ai/threats/technologies/exchange-online","json_url":"https://junglewise.ai/threats/technologies/exchange-online.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/exchange-online","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":1,"all_time":5,"critical":4,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":3,"last_365_days":5},"latest":[{"cve":"CVE-2026-65801","cvss":10,"epss":0.009,"slug":"cve-2026-65801-microsoft-exchange-online-server-side-request-forgery","title":"Microsoft Exchange Online server-side request forgery","severity":"critical","exploited":false,"published_at":"2026-08-20T22:17:54.897+00:00","url":"https://junglewise.ai/threats/cve-2026-65801-microsoft-exchange-online-server-side-request-forgery"},{"cve":"CVE-2026-56191","cvss":10,"slug":"cve-2026-56191-microsoft-exchange-online-improper-authentication","title":"Microsoft Exchange Online improper authentication","severity":"critical","exploited":false,"published_at":"2026-07-24T01:17:36.417+00:00","url":"https://junglewise.ai/threats/cve-2026-56191-microsoft-exchange-online-improper-authentication"},{"cve":"CVE-2026-54998","cvss":8.8,"slug":"cve-2026-54998-microsoft-exchange-online-privilege-escalation-via-incorrect","title":"Microsoft Exchange Online privilege escalation via incorrect authorization","severity":"high","exploited":false,"published_at":"2026-07-02T23:16:51.137+00:00","url":"https://junglewise.ai/threats/cve-2026-54998-microsoft-exchange-online-privilege-escalation-via-incorrect"},{"cve":"CVE-2026-48582","cvss":9.6,"slug":"cve-2026-48582-microsoft-exchange-online-privilege-escalation-via-missing","title":"Microsoft Exchange Online privilege escalation via missing authorization","severity":"critical","exploited":false,"published_at":"2026-06-19T21:17:00.787+00:00","url":"https://junglewise.ai/threats/cve-2026-48582-microsoft-exchange-online-privilege-escalation-via-missing"},{"cve":"CVE-2026-48579","cvss":9.1,"slug":"cve-2026-48579-microsoft-exchange-online-improper-authorization","title":"Microsoft Exchange Online improper authorization","severity":"critical","exploited":false,"published_at":"2026-06-04T23:17:32.83+00:00","url":"https://junglewise.ai/threats/cve-2026-48579-microsoft-exchange-online-improper-authorization"}],"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":1},{"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":1,"exploited":0,"vulnerabilities":1},{"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":1,"exploited":0,"vulnerabilities":1},{"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":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0}],"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 Exchange Online","slug":"exchange-online","vendor":{"name":"Microsoft","slug":"microsoft","url":"https://junglewise.ai/threats/vendors/microsoft"},"aliases":[],"category":"SaaS","homepage":"https://www.microsoft.com/en-us/microsoft-365/exchange/exchange-online","repo_url":"https://www.microsoft.com/en-us/microsoft-365/exchange/exchange-online","description":"A cloud-based messaging platform that provides email, calendar, and contacts.","url":"https://junglewise.ai/threats/technologies/exchange-online"},"most_severe":[{"cve":"CVE-2026-65801","cvss":10,"epss":0.009,"slug":"cve-2026-65801-microsoft-exchange-online-server-side-request-forgery","title":"Microsoft Exchange Online server-side request forgery","severity":"critical","exploited":false,"published_at":"2026-08-20T22:17:54.897+00:00","url":"https://junglewise.ai/threats/cve-2026-65801-microsoft-exchange-online-server-side-request-forgery"},{"cve":"CVE-2026-56191","cvss":10,"slug":"cve-2026-56191-microsoft-exchange-online-improper-authentication","title":"Microsoft Exchange Online improper authentication","severity":"critical","exploited":false,"published_at":"2026-07-24T01:17:36.417+00:00","url":"https://junglewise.ai/threats/cve-2026-56191-microsoft-exchange-online-improper-authentication"},{"cve":"CVE-2026-48582","cvss":9.6,"slug":"cve-2026-48582-microsoft-exchange-online-privilege-escalation-via-missing","title":"Microsoft Exchange Online privilege escalation via missing authorization","severity":"critical","exploited":false,"published_at":"2026-06-19T21:17:00.787+00:00","url":"https://junglewise.ai/threats/cve-2026-48582-microsoft-exchange-online-privilege-escalation-via-missing"},{"cve":"CVE-2026-48579","cvss":9.1,"slug":"cve-2026-48579-microsoft-exchange-online-improper-authorization","title":"Microsoft Exchange Online improper authorization","severity":"critical","exploited":false,"published_at":"2026-06-04T23:17:32.83+00:00","url":"https://junglewise.ai/threats/cve-2026-48579-microsoft-exchange-online-improper-authorization"},{"cve":"CVE-2026-54998","cvss":8.8,"slug":"cve-2026-54998-microsoft-exchange-online-privilege-escalation-via-incorrect","title":"Microsoft Exchange Online privilege escalation via incorrect authorization","severity":"high","exploited":false,"published_at":"2026-07-02T23:16:51.137+00:00","url":"https://junglewise.ai/threats/cve-2026-54998-microsoft-exchange-online-privilege-escalation-via-incorrect"}],"generated_at":"2026-09-26T09:24:00.138874+00:00"}