CVE-2025-53782

Microsoft Exchange Server Elevation of Privilege Vulnerability

At a glance

Severity
HIGH 8.4
EPSS
EPSS 0.36 % · percentile 29 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
microsoft
NVD status
Analyzed

Description

Incorrect implementation of authentication algorithm in Microsoft Exchange Server allows an unauthorized attacker to elevate privileges locally.

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 8.4CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Cmicrosoft
CVSS 3.1HIGH 8.4CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD · secure@microsoft.com (Secondary)
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Microsoft · Microsoft Exchange Server 2016 Cumulative Update 23affected 15.01.0.0 < 15.01.2507.061
Microsoft · Microsoft Exchange Server 2019 Cumulative Update 14affected 15.02.0.0 < 15.02.1544.036
Microsoft · Microsoft Exchange Server 2019 Cumulative Update 15affected 15.02.0.0 < 15.02.1748.039
Microsoft · Microsoft Exchange Server Subscription Edition RTMaffected 15.02.0.0 < 15.02.2562.029

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD