Vulnerability record/PUBLISHED/Published Nov 12, 2026 03:35:49 UTC

CVE-2026-15201

An improper certificate validation vulnerability in the Support Form in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1 allows man-in-the-middle attackers to read arbitrary files and write specific files during support form submission.

Base score5.9/ 10

SeverityMediumCVSS 3.1

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityMedium

Attack vectorNetworkAV

Attack complexityHighAC

Privileges requiredNonePR

User interactionRequiredUI

ScopeUnchangedS

Confidentiality impactHighC

Integrity impactLowI

Availability impactNoneA

CVSS vector stringCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering Authoritysynology

Last updatedNov 12, 2026 03:35:49 UTC

PublishedNov 12, 2026 03:35:49 UTC

ReservedJul 9, 2026 06:29:15 UTC

Credits

JUNYI LIU (@mosskappa)