Weak Cryptographic Algorithm in Microsoft Exchange Server Information Disclosure

Publication date: 2026-09-08

Last updated on: 2026-09-29

Assigner: Microsoft Corporation

Description

Use of a broken or risky cryptographic algorithm in Microsoft Exchange Server allows an unauthorized attacker to disclose information over a network.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-08

Last Modified

2026-09-29

Generated

2026-10-19

AI Q&A

2026-09-09

EPSS Evaluated

2026-10-18

NVD

CVE-2026-69382

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	exchange_server	2016
microsoft	exchange_server	2019
microsoft	exchange_server	2019
microsoft	exchange_server_subscription_edition	to 15.02.2562.049 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-327	The product uses a broken or risky cryptographic algorithm or protocol.

Attack-Flow Graph

Executive Summary

This vulnerability involves the use of a broken or risky cryptographic algorithm in Microsoft Exchange Server. An unauthorized attacker can exploit this to disclose information over a network without needing special access or user interaction.

Impact Analysis

An attacker could access sensitive information transmitted through the Exchange Server. The impact is limited to information disclosure, with no direct modification or denial-of-service effects. The CVSS score indicates a moderate risk level.

Mitigation Strategies

Apply the latest security updates from Microsoft for Exchange Server to address the cryptographic vulnerability. Monitor Microsoft's security advisories for patches and follow their recommended mitigation steps.

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