Microsoft Exchange Server Hybrid Deployment Elevation of Privilege Vulnerability (Microsoft Microsoft Exchange Server 2016 Cumulative Update 23)
At a glance
- Source
- NVD
- EPSS
- EPSS 7.59 % · percentile 95 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- microsoft
- NVD status
- Analyzed
Description
On April 18th 2025, Microsoft announced Exchange Server Security Changes for Hybrid Deployments and accompanying non-security Hot Fix. Microsoft made these changes in the general interest of improving the security of hybrid Exchange deployments. Following further investigation, Microsoft identified specific security implications tied to the guidance and configuration steps outlined in the April announcement. Microsoft is issuing CVE-2025-53786 to document a vulnerability that is addressed by taking the steps documented with the April 18th announcement. Microsoft strongly recommends reading the information, installing the April 2025 (or later) Hot Fix and implementing the changes in your Exchange Server and hybrid environment.
Weaknesses (CWE)
- CWE-287 — Improper Authentication
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.0 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C | microsoft |
| CVSS 3.1 | HIGH 8.0 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H | NVD · secure@microsoft.com (Secondary) |
European references
- ENISA EUVD · EUVD-2025-23857
- GCVE · GCVE-0-2025-53786
CERT-FR advisories
- CERTFR-2025-AVI-0659 — Vulnérabilité dans Microsoft Exchange Server · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_23:*:*:*:*:*:*cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_14:*:*:*:*:*:*cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_15:*:*:*:*:*:*cpe:2.3:a:microsoft:exchange_server_subscription_edition:*:*:*:*:*:*:*:*< 15.02.2562.017
Affected products
| Product | Versions |
|---|---|
| Microsoft · Microsoft Exchange Server 2016 Cumulative Update 23 | affected 15.01.0.0 < 15.01.2507.055 |
| Microsoft · Microsoft Exchange Server 2019 Cumulative Update 14 | affected 15.02.0.0 < 15.02.1544.025 |
| Microsoft · Microsoft Exchange Server 2019 Cumulative Update 15 | affected 15.02.0.0 < 15.02.1748.024 |
| Microsoft · Microsoft Exchange Server Subscription Edition RTM | affected 15.02.0.0 < 15.02.2562.017 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |