CVE-2026-6205 Synology DiskStation Manager - Unrestricted File Upload

Synology DiskStation Manager (DSM) < 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075 contains an unrestricted file write vulnerability caused by external control of file name or path in Upload API, letting remote authenticated users write arbitrary files and cause denial of service.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.52% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Unrestricted File Upload
Impact
File System Write, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-73

Vendor fix

Update to versions 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, 7.4-90075 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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