Microsoft Exchange Server ↗
On-premises Exchange Server only. Exchange Online (Microsoft 365) is a cloud service patched by Microsoft and is not covered here.
Summary iPlain-English security verdict for Microsoft Exchange Server, generated from its current health score, actively-exploited vulnerabilities, and latest supported version.
Microsoft Exchange Server's security status could not be assessed at the last sync — vulnerability data was unavailable.
Disclosure trend iNew CVEs published for Microsoft Exchange Server each year (NVD). A higher bar means more disclosures that year — more scrutiny, not necessarily less safe.
Patch priority — what to act on iThe issues to fix first — actively exploited (CISA KEV) first, then by exploitation probability (EPSS), then severity. Each row's "→ fixed in" is the earliest version that patches it; "see advisory" means no fixed version is published.
No urgent unpatched issues identified. ✓
How to patch Microsoft Exchange Server — step-by-step to the latest secure version →
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Versions & lifecycle iWhen each release line stops receiving security patches (end-of-life). After EOL there are no more fixes — plan upgrades before these dates.
How long each Microsoft Exchange Server release line is supported — and when it sunsets. Select a line for its full report.
Full Microsoft Exchange Server end-of-life dates & support timeline →
subscription latest 15.2.2562.43 Supported 15.2.2562.43 → 2019 latest 15.2.1748.46 End of life ended 2025-10-1415.2.1748.46 → 2016 latest 15.1.2507.69 End of life ended 2025-10-1415.1.2507.69 → 2013 latest 15.0.1497.48 End of life ended 2023-04-1115.0.1497.48 → 2010 latest 14.3.513.0 End of life ended 2020-10-1314.3.513.0 → 2007 latest 8.3.517.0 End of life ended 2017-04-118.3.517.0 → 2003 latest 6.5.7654.4 End of life ended 2014-04-086.5.7654.4 → 2000 latest 6.0.6620.7 End of life ended 2011-01-116.0.6620.7 → 5.5 latest 5.5.2653 End of life ended 2006-01-105.5.2653 → 5.0 latest 5.0.1460 End of life ended 2006-01-105.0.1460 → See all upcoming end-of-life dates →Frequently asked
Is Microsoft Exchange Server safe and patched?
Microsoft Exchange Server's security status could not be assessed at the last sync — vulnerability data was unavailable.
What should I do about Microsoft Exchange Server now?
Upgrade Microsoft Exchange Server to the latest supported release (15.2.2562.43) or later and apply available security updates, then confirm against Microsoft's official advisory.
When does Microsoft Exchange Server reach end-of-life?
The latest supported Microsoft Exchange Server release is 15.2.2562.43. After end-of-life a release no longer receives security patches.
Which versions of Microsoft Exchange Server are still receiving security updates?
Supported Microsoft Exchange Server release lines (latest 15.2.2562.43): subscription. End-of-life releases no longer receive security patches.
Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against Microsoft's official advisory before you patch or upgrade — Microsoft Exchange Server official site ↗