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CVE-2026-81557VulnerabilityPublished

An improper neutralization of input during web page generation vulnerability in the DSMNotify in Synology DiskStation

Source GCVE Database

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Authoritative record:CVE-2026-81557· Medium 5.4

Not known to be exploited · CVSS 5.4 Medium.

Data as of 12 Nov 2026, 07:18 UTC

CVSS 3.1 base score
5.4Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (synology)CVSS 3.15.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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

The vulnerability affects DSM versions before 7.3.2-86009-5 and 7.4.1-90080-1. Users should upgrade to these or later versions where the issue is fixed. No vendor advisory or patch links were provided in the input, but the presence of fixed versions indicates that official patches exist. Applying these updates is the recommended remediation.

Description

A vulnerability in Synology DiskStation Manager (DSM) before versions 7.3.2-86009-5 and 7.4.1-90080-1 allows remote authenticated users to read or write specific files due to improper neutralization of input during web page generation in the DSMNotify component.

References

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