CVE-2026-40539
CVSS Score
7.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-295 |
| Vendor | synology |
| Product | diskstation manager (dsm) |
| Published | Sep 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Synology / DiskStation Manager (DSM)
7.3 < 7.3.2-86009-2 7.2.2 < 7.2.2-72806-7 7.2.1 < 7.2.1-69057-10
References
Credits
Ben R of Interrupt Labs (https://www.interruptlabs.co.uk)