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CVE-2026-88266VulnerabilityPublished

An external control of system or configuration setting vulnerability in the synomount in Synology DiskStation Manager

Source GCVE Database

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Authoritative record:CVE-2026-88266· Medium 4.3

Not known to be exploited · CVSS 4.3 Medium · fixed in 7.3.2 : update DiskStation Manager (DSM) when convenient.

Data as of 12 Nov 2026, 07:17 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (synology)CVSS 3.14.3
Patch
Available – fixed in 7.3.2
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
SynologyDiskStation Manager (DSM)Affected
  • >=7.4.1 <7.4.1-90080-1
  • >=7.3.2 <7.3.2-86009-5
Fixed in–

AI-suggested

A fix is available in Synology DiskStation Manager versions 7.3.2-86009-5 and 7.4.1-90080-1. Users should upgrade to these or later versions to remediate the vulnerability. No additional mitigation steps are indicated.

Description

A vulnerability in the synomount component of Synology DiskStation Manager (DSM) before versions 7.3.2-86009-5 and 7.4.1-90080-1 allows remote authenticated users to write specific files. This issue involves external control of system or configuration settings. The vulnerability has a medium severity with a CVSS score of 4.3 and does not impact confidentiality or availability but impacts integrity.

References

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