# CVE-2026-69382: Microsoft Exchange Server weak cryptography information disclosure

Source: https://junglewise.ai/threats/cve-2026-69382-microsoft-exchange-server-weak-cryptography-information  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-69382 · Severity: medium · CVSS 5.9 · Published 2026-09-08

Microsoft Exchange Server uses a weak or broken cryptographic algorithm that allows an attacker to intercept and read sensitive information transmitted over the network. This could expose confidential business communications, credentials, or other sensitive data that flows through the mail server.

Technologies: [Microsoft Exchange Server](https://junglewise.ai/threats/technologies/exchange-server). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69382 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69382 being exploited in the wild.

**How severe is CVE-2026-69382?** Medium severity, with a CVSS score of 5.9, published 8 September 2026.

**Which products and versions are affected?** Microsoft Exchange Server.

**Is there a fix for CVE-2026-69382?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-69382 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-69382?** Check whether you run Microsoft Exchange Server. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This vulnerability results from the use of a broken or risky cryptographic algorithm in Microsoft Exchange Server. An unauthorized attacker can exploit this weakness to disclose information transmitted over the network. The attack requires network access to Exchange Server communications. Successful exploitation leads to information disclosure without requiring authentication or user interaction. Microsoft has issued security updates to address this issue.

## Affected products

- Microsoft Exchange Server

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69382](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69382)

## Related threats

- [Microsoft Exchange Server improper access control spoofing](https://junglewise.ai/threats/cve-2026-118208-improper-access-control-in-microsoft-exchange-server-allows-an)
- [Microsoft Exchange Server improper input validation code execution](https://junglewise.ai/threats/cve-2026-118207-improper-input-validation-in-microsoft-exchange-server-allows-an)
- [Microsoft Exchange Server weak authentication privilege elevation](https://junglewise.ai/threats/cve-2026-118157-weak-authentication-in-microsoft-exchange-server-allows-an)
- [Microsoft Exchange Server privilege elevation via untrusted security decision input](https://junglewise.ai/threats/cve-2026-118154-reliance-on-untrusted-inputs-in-a-security-decision-in-microsoft)
- [Microsoft Exchange Server algorithmic complexity denial of service](https://junglewise.ai/threats/cve-2026-118153-inefficient-algorithmic-complexity-in-microsoft-exchange-server)