Home / Threat Intelligence bulletins / End of support for Microsoft Exchange Server 2013

Target Industry

All industries using Microsoft Exchange Server 2013.


Microsoft Exchange Server 2013 reached its End of Life (EoL) on 11th April 2023. This means that Microsoft will no longer provide technical support, bug fixes, or security updates for the product. This could leave organisations using this version of Exchange vulnerable to security threats and other issues.


The impact of using Exchange Server 2013 after its EoL date is that any security vulnerabilities discovered will not be patched by Microsoft, leaving the system vulnerable to attacks. Additionally, users of the system will not receive any technical support, which could lead to extended downtime if issues arise.

Vulnerability Detection

Organisations can detect if they are running Exchange Server 2013 by checking the version number of their Exchange Server software.

Affected Products

Microsoft Exchange Server 2013 is the only affected product.

Containment, Mitigations & Remediations

To mitigate the risks associated with using Exchange Server 2013 after its EoL date, organisations should consider upgrading to a supported version of Exchange Server or moving to a cloud-based email service. Alternatively, they may consider implementing additional security measures such as firewalls, intrusion detection systems (IDS), and endpoint protection software to help protect against attacks.

Indicators of Compromise

No specific indicators of compromise have been identified at this time, but organisations should be vigilant for any suspicious activity on their Exchange Server 2013 systems.

Threat Landscape

The threat landscape for the Exchange Server 2013 will become increasingly dangerous as new vulnerabilities are discovered and remain unpatched. Attacks may take advantage of these vulnerabilities to gain unauthorised access to systems, steal sensitive data, or pivot to new attacks.

Threat Group

No specific threat groups have been identified at this time, but as Exchange Server 2013 becomes increasingly vulnerable, it is likely that attackers will begin to target these systems more frequently.

Further Information

Additionally, all advice and recommendations discussed in this bulletin can be extended to any Office 2013 application. As new vulnerabilities are discovered and left unpatched, organisations still using the Office 2013 suite of tools become more vulnerable to attack.

Exchange 2013 end of support roadmap
Exchange Server 2013 End of Support Reminder
End of support for Office 2013


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