Cyber Resilience

CVE-2025-53782

High

Published: 14 October 2025

Published
14 October 2025
Modified
27 October 2025
KEV Added
—
Patch
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CVSS Score v3.1 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0007 22.2th percentile
Risk Priority 17 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-53782 is a high-severity Incorrect Implementation of Authentication Algorithm (CWE-303) vulnerability in Microsoft Exchange Server. Its CVSS base score is 8.4 (High).

Operationally, ranked at the 22.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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

CWE(s)
CWE-303NVD-CWE-noinfo

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

microsoft
exchange server
2016, 2019 · ≤ 15.02.2562.029

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References