Our servers are protected against the PHP security vulnerability disclosed in October. The update was installed on 21 October 2026. More about php2shell

Patch

Microsoft Exchange 4.0

Support for Microsoft Exchange 4.0 has ended. There are no more security updates for this branch.

End of support reached

Latest version: 4.0.996, released on 05/05/1998

End of support: no date known

Vulnerabilities in Microsoft Exchange 4.0

We are loading the vulnerabilities of Microsoft Exchange from the NVD. Until then this page shows versions and end of support only.

Get notified

Add Microsoft Exchange with your version and Erseni Patch writes to you about new versions, vulnerabilities in exactly your version and the end of support.

Watch Microsoft Exchange 4.0

Already have an account? Log in and add Microsoft Exchange 4.0

All branches of Microsoft Exchange