CVE-2026-85101 PUBLISHED

Assigner: synology
Reserved: 03.09.2026 Published: 12.11.2026 Updated: 12.11.2026

An authentication bypass using an alternate path or channel vulnerability in the rsync in Synology DiskStation Manager (DSM) before 7.2.1-69057-13, 7.2.2-72806-10, 7.3.2-86009-5, and 7.4.1-90080-1 allows remote attackers to read specific files, write arbitrary files, and conduct limited denial-of-service attacks.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
CVSS Score: 8.6

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

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.) affected from 7.2.2 to 7.2.2-72806-10 (excl.) affected from 7.2.1 to 7.2.1-69057-13 (excl.) unknown from 0 to 7.2.1 (excl.)

Credits

Warisse Valentin (Aytio) finder

References

Synology-SA-26:19 DSM

Problem Types

Authentication Bypass Using an Alternate Path or Channel CWE