BaseFortify

Publication date: 2025-10-14

Last updated on: 2026-06-15

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2025-10-14

Last Modified

2026-06-15

Generated

2026-07-06

AI Q&A

2025-10-14

EPSS Evaluated

2026-07-05

NVD

CVE-2025-53782

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2019
microsoft	exchange_server	2016
microsoft	exchange_server	2019
microsoft	exchange_server	2016
microsoft	exchange_server	2019
microsoft	exchange_server	2019
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2019
microsoft	exchange_server	2019
microsoft	exchange_server	2019
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2019
microsoft	exchange_server	2016
microsoft	exchange_server	2019
microsoft	exchange_server	2016
microsoft	exchange_server	2016
microsoft	exchange_server	2019
microsoft	exchange_server	2016
microsoft	exchange_server	2019
microsoft	exchange_server	2016
microsoft	exchange_server	2019
microsoft	exchange_server	2019
microsoft	exchange_server	2019
microsoft	exchange_server_subscription_edition	to 15.02.2562.029 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-303	The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.
CWE-NVD-CWE-noinfo

Attack-Flow Graph

Executive Summary

This vulnerability is due to an incorrect implementation of the authentication algorithm in Microsoft Exchange Server, which allows an unauthorized attacker to locally elevate their privileges.

Impact Analysis

An attacker exploiting this vulnerability can gain higher privileges on the affected Microsoft Exchange Server without authorization, potentially leading to full control over the system and compromising confidentiality, integrity, and availability of data.

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