# Microsoft Exchange Server 2016 and 2019 enter their 'permanently vulnerable' era

Source: [www.theregister.com - Articles](https://www.theregister.com/saas/2026/11/12/microsoft-exchange-server-2016-and-2019-enter-their-permanently-vulnerable-era/5309401) · 2026-11-12 · Industry
Page: https://themorning.dev/story/microsoft-exchange-server-2016-and-2019-enter-their-permanently-vulnerable-era-2a38c65665076c7f
Kind: security · Impact: high

## In brief

- Microsoft says Exchange Server 2016 and 2019 are 'permanently vulnerable'.
- November's security fixes are released for Exchange Server Subscription Edition (SE) only.

## Why it matters

Servers still running Exchange Server 2016 or 2019 will not receive these security fixes, so their exposure will persist unless they move to a supported version.

## Versions

- Exchange Server 2016
- Exchange Server 2019
- Exchange Server Subscription Edition

## Timeline

- 2026-11-12: Microsoft's November release documentation calls Exchange Server 2016 and 2019 'permanently vulnerable' and security fixes arrive for Subscription Edition only

## Coverage

- [Microsoft Exchange Server 2016 and 2019 enter their 'permanently vulnerable' era](https://www.theregister.com/saas/2026/11/12/microsoft-exchange-server-2016-and-2019-enter-their-permanently-vulnerable-era/5309401) — www.theregister.com - Articles, 2026-11-12

Tags: exchange-server, microsoft, security-updates, end-of-support, email

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