The Microsoft Exchange Server installed on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - Double free in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
    (CVE-2026-55007)

  - External control of file name or path in Microsoft Exchange Server allows an authorized attacker to     execute code over a network. (CVE-2026-69355)

  - Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange     Server allows an unauthorized attacker to perform spoofing over a network. (CVE-2026-69356)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

Microsoft Exchange Server (September 2026)

critical Nessus Plugin ID 343866

Version 1.5