CVE-2026-15201 PUBLISHED

Assigner: synology
Reserved: 09.07.2026 Published: 12.11.2026 Updated: 12.11.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
CVSS Score: 5.9

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	Low
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Synology
Product	DiskStation Manager (DSM)
Versions	Default: affected affected from 7.4.1 to 7.4.1-90080-1 (excl.) affected from 7.3.2 to 7.3.2-86009-5 (excl.) unknown from 0 to 7.3.2 (excl.)

Credits

JUNYI LIU (@mosskappa) finder

References

Synology-SA-26:18 DSM

Problem Types

Improper Certificate Validation CWE