CVE-2026-88266: Synology DiskStation Manager (DSM) · External Control of System or Configuration Setting
Affects Synology DiskStation Manager (DSM)Source CVE Database V5
Not known to be exploited · CVSS 4.3 Medium.
Data as of 12 Nov 2026, 04:03 UTC
Thin evidence
One scorer or none| CNA (synology) | CVSS 3.1 | 4.3 |
|---|
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 12 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| SynologyDiskStation Manager (DSM) | Affected
| Fixed in– |
AI-suggested
Users should upgrade Synology DiskStation Manager to versions 7.3.2-86009-5 or later, or 7.4.1-90080-1 or later, where this vulnerability is fixed. Since the vulnerability requires authentication, ensuring strong access controls and limiting user privileges can reduce risk until patched.
Description
CVE-2026-88266 is a vulnerability in Synology DiskStation Manager (DSM) affecting versions prior to 7.3.2-86009-5 and 7.4.1-90080-1. It allows remote authenticated users to write specific files via the synomount component, potentially leading to unauthorized configuration changes. The vulnerability has a medium severity with a CVSS score of 4.3.