BaseFortify

Publication date: 2025-10-14

Last updated on: 2026-06-15

Assigner: Microsoft Corporation

Description

Weak authentication in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

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-2025-59249

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-1390	The product uses an authentication mechanism to restrict access to specific users or identities, but the mechanism does not sufficiently prove that the claimed identity is correct.
CWE-NVD-CWE-noinfo

Attack-Flow Graph

Executive Summary

This vulnerability is a weakness in the authentication mechanism of Microsoft Exchange Server that allows an authorized attacker to elevate their privileges over a network.

Impact Analysis

An attacker exploiting this vulnerability can gain higher privileges than intended, potentially leading to full control over the affected Microsoft Exchange Server, which can result in data compromise, service disruption, and unauthorized actions.

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