CVE-2026-74857 PUBLISHED

Assigner: synology
Reserved: 17.08.2026 Published: 12.11.2026 Updated: 12.11.2026

A missing critical step in authentication vulnerability in the Auth API in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1 allows remote authenticated users to read or write arbitrary files and conduct denial-of-service attacks.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Synology
Product	DiskStation Manager (DSM)
Versions	Default: affected affected from 7.4.1 to 7.4.1-90080-1 (excl.) affected from 7.3.2 to 7.3.2-86009-5 (excl.) unknown from 0 to 7.3.2 (excl.)

Credits

p4p3r(@P4P3R-HAK) finder

References

Synology-SA-26:18 DSM

Problem Types

Missing Critical Step in Authentication CWE