{"schema_version":1,"title":"Microsoft Exchange Server Subscription Edition vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 6 vulnerabilities in Microsoft Exchange Server Subscription Edition: 0 in the last 7 days and 4 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-62911, was published on 11 August 2026.","url":"https://junglewise.ai/threats/technologies/exchange-server-subscription-edition","json_url":"https://junglewise.ai/threats/technologies/exchange-server-subscription-edition.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-server-subscription-edition","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":4,"all_time":6,"critical":1,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":4,"last_365_days":5},"latest":[{"cve":"CVE-2026-62911","cvss":8,"epss":0.0069,"slug":"cve-2026-62911-microsoft-exchange-server-privilege-escalation-via-ntlm-relay-to","title":"Microsoft Exchange Server privilege escalation via NTLM relay to MRSProxy","severity":"high","exploited":false,"published_at":"2026-08-11T17:18:45.073+00:00","url":"https://junglewise.ai/threats/cve-2026-62911-microsoft-exchange-server-privilege-escalation-via-ntlm-relay-to"},{"cve":"CVE-2026-55009","cvss":7.8,"slug":"cve-2026-55009-microsoft-exchange-server-deserialization-privilege-escalation","title":"Microsoft Exchange Server deserialization privilege escalation","severity":"high","exploited":false,"published_at":"2026-07-14T17:17:08.883+00:00","url":"https://junglewise.ai/threats/cve-2026-55009-microsoft-exchange-server-deserialization-privilege-escalation"},{"cve":"CVE-2026-55008","cvss":9.6,"slug":"cve-2026-55008-microsoft-exchange-server-cross-site-scripting-spoofing","title":"Microsoft Exchange Server cross-site scripting spoofing vulnerability","severity":"critical","exploited":false,"published_at":"2026-07-14T17:17:08.763+00:00","url":"https://junglewise.ai/threats/cve-2026-55008-microsoft-exchange-server-cross-site-scripting-spoofing"},{"cve":"CVE-2026-55005","cvss":8.8,"slug":"cve-2026-55005-microsoft-exchange-server-heap-overflow-remote-code-execution","title":"Microsoft Exchange Server heap overflow remote code execution","severity":"high","exploited":false,"published_at":"2026-07-14T17:17:08.537+00:00","url":"https://junglewise.ai/threats/cve-2026-55005-microsoft-exchange-server-heap-overflow-remote-code-execution"},{"cve":"CVE-2026-21527","cvss":6.5,"epss":0.0946,"slug":"cve-2026-21527-microsoft-exchange-server-ui-misrepresentation-spoofing","title":"Microsoft Exchange Server UI misrepresentation spoofing vulnerability","severity":"medium","exploited":false,"published_at":"2026-02-10T18:16:35.093+00:00","url":"https://junglewise.ai/threats/cve-2026-21527-microsoft-exchange-server-ui-misrepresentation-spoofing"},{"cve":"CVE-2025-53786","cvss":8,"epss":0.0742,"slug":"cve-2025-53786-microsoft-exchange-server-improper-authentication-in-hybrid","title":"Microsoft Exchange Server improper authentication in hybrid deployments","severity":"high","exploited":false,"published_at":"2025-08-06T16:15:30.7+00:00","url":"https://junglewise.ai/threats/cve-2025-53786-microsoft-exchange-server-improper-authentication-in-hybrid"}],"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":1,"exploited":0,"vulnerabilities":3},{"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":1},{"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":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 Server Subscription Edition","slug":"exchange-server-subscription-edition","vendor":{"name":"Microsoft","slug":"microsoft","url":"https://junglewise.ai/threats/vendors/microsoft"},"aliases":[],"category":"mail-server","homepage":"https://www.microsoft.com/en-us/microsoft-365/exchange/email-server-software","repo_url":"https://www.microsoft.com/en-us/microsoft-365/exchange/email-server-software","description":"A subscription-based version of the Microsoft Exchange Server email and calendaring platform.","url":"https://junglewise.ai/threats/technologies/exchange-server-subscription-edition"},"most_severe":[{"cve":"CVE-2026-55008","cvss":9.6,"slug":"cve-2026-55008-microsoft-exchange-server-cross-site-scripting-spoofing","title":"Microsoft Exchange Server cross-site scripting spoofing vulnerability","severity":"critical","exploited":false,"published_at":"2026-07-14T17:17:08.763+00:00","url":"https://junglewise.ai/threats/cve-2026-55008-microsoft-exchange-server-cross-site-scripting-spoofing"},{"cve":"CVE-2026-55005","cvss":8.8,"slug":"cve-2026-55005-microsoft-exchange-server-heap-overflow-remote-code-execution","title":"Microsoft Exchange Server heap overflow remote code execution","severity":"high","exploited":false,"published_at":"2026-07-14T17:17:08.537+00:00","url":"https://junglewise.ai/threats/cve-2026-55005-microsoft-exchange-server-heap-overflow-remote-code-execution"},{"cve":"CVE-2025-53786","cvss":8,"epss":0.0742,"slug":"cve-2025-53786-microsoft-exchange-server-improper-authentication-in-hybrid","title":"Microsoft Exchange Server improper authentication in hybrid deployments","severity":"high","exploited":false,"published_at":"2025-08-06T16:15:30.7+00:00","url":"https://junglewise.ai/threats/cve-2025-53786-microsoft-exchange-server-improper-authentication-in-hybrid"},{"cve":"CVE-2026-62911","cvss":8,"epss":0.0069,"slug":"cve-2026-62911-microsoft-exchange-server-privilege-escalation-via-ntlm-relay-to","title":"Microsoft Exchange Server privilege escalation via NTLM relay to MRSProxy","severity":"high","exploited":false,"published_at":"2026-08-11T17:18:45.073+00:00","url":"https://junglewise.ai/threats/cve-2026-62911-microsoft-exchange-server-privilege-escalation-via-ntlm-relay-to"},{"cve":"CVE-2026-55009","cvss":7.8,"slug":"cve-2026-55009-microsoft-exchange-server-deserialization-privilege-escalation","title":"Microsoft Exchange Server deserialization privilege escalation","severity":"high","exploited":false,"published_at":"2026-07-14T17:17:08.883+00:00","url":"https://junglewise.ai/threats/cve-2026-55009-microsoft-exchange-server-deserialization-privilege-escalation"},{"cve":"CVE-2026-21527","cvss":6.5,"epss":0.0946,"slug":"cve-2026-21527-microsoft-exchange-server-ui-misrepresentation-spoofing","title":"Microsoft Exchange Server UI misrepresentation spoofing vulnerability","severity":"medium","exploited":false,"published_at":"2026-02-10T18:16:35.093+00:00","url":"https://junglewise.ai/threats/cve-2026-21527-microsoft-exchange-server-ui-misrepresentation-spoofing"}],"generated_at":"2026-09-26T09:24:00.138874+00:00"}