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CVE-2026-81558 synology diskstation manager (dsm): Missing Authorization

4.3 mediumEPSS 0.4%

Medium (4.3) in synology diskstation manager (dsm). EPSS 0.4% estimated probability of exploitation activity in the next 30 days.

On this page
A missing authorization vulnerability in the SocketIo API in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1 allows remote authenticated users to write specific files.

Severity

CVSS 3.1

4.3 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS
0.4% estimated probability of exploitation activity in the next 30 days; 35th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CWE
CWE-862 Missing Authorization
OWASP Top 10
A01:2025 Broken Access Control
Published
Modified
Assigned by
synology (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

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Affected

  • synology:diskstation manager (dsm)

Versions

From the CNA's record in the CVE List.

ProductAffected
Synology DiskStation Manager (DSM)from 7.4.1 before 7.4.1-90080-1
Synology DiskStation Manager (DSM)from 7.3.2 before 7.3.2-86009-5

Attack patterns (CAPEC)

  • CAPEC-665 Exploitation of Thunderbolt Protection Flaws Likelihood: Low · Severity: Very High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

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