An improper certificate validation vulnerability in Email API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows man-in-the-middle attackers to read or write arbitrary files and conduct denial-of-service attacks.

Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

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History

Sat, 19 Sep 2026 22:30:00 +0000

Type Values Removed Values Added
First Time appeared Synology
Synology diskstation Manager
Vendors & Products Synology
Synology diskstation Manager

Sat, 19 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
Title Improper Certificate Validation in Synology DSM Email API Enables Remote File Access and DoS

Sat, 19 Sep 2026 01:15:00 +0000

Type Values Removed Values Added
Title Improper Certificate Validation in Synology DSM Email API Enables Remote File Access and DoS

Fri, 18 Sep 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 18 Sep 2026 08:45:00 +0000

Type Values Removed Values Added
Description An improper certificate validation vulnerability in Email API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows man-in-the-middle attackers to read or write arbitrary files and conduct denial-of-service attacks.
Weaknesses CWE-295
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: synology

Published:

Updated: 2026-09-18T10:40:16.842Z

Reserved: 2026-04-14T01:01:14.607Z

Link: CVE-2026-40539

cve-icon Vulnrichment

Updated: 2026-09-18T10:39:56.419Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-18T09:16:41.423

Modified: 2026-09-18T19:07:38.320

Link: CVE-2026-40539

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-19T22:15:05Z

Weaknesses