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CVE-2026-85101

8.6, high

Synology DiskStation Manager (DSM) Authentication Bypass Using an Alternate Path or Channel Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.6, high high CVSS v3.1
EPSS, next 30 days
0.6% higher than 48% of scored CVEs
Exploitation
No public evidence
Published
12 Nov 2026yesterday

Description

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.

Details

Vendor
Synology
Product
DiskStation Manager (DSM)
Weakness
CWE-288 (opens in a new tab)
Status
Awaiting analysis
Updated
12 Nov 2026
Assigner
security@synology.com

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

References 1

Advisories 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Synology CVEs

Every Synology CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-76954 Synology DiskStation Manager (DSM) SQL Injection Vulnerability EPSS 0.6% 9.8, critical
  • CVE-2026-13672 Synology DiskStation Manager (DSM) Authorization Bypass Through User-Controlled Key Vulnerability EPSS 0.7% 8.8, high
  • CVE-2026-18596 Synology DiskStation Manager (DSM) Authentication Bypass Using an Alternate Path or Channel Vulnerability EPSS 0.7% 8.1, high
  • CVE-2026-18633 An access of uninitialized pointer vulnerability in the nfsd in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and… EPSS 0.8% 7.5, high
  • CVE-2026-18792 Synology DiskStation Manager (DSM) Path Traversal Vulnerability EPSS 0.9% 8.8, high
  • CVE-2026-19048 Synology DiskStation Manager (DSM) Link Following Vulnerability EPSS 0.8% 8.1, high
  • CVE-2026-74857 A missing critical step in authentication vulnerability in the Auth API in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and… EPSS 0.9% 8.8, high
  • CVE-2026-75785 Synology DiskStation Manager (DSM) OS Command Injection Vulnerability EPSS 0.9% 7.2, high

Beyond this page

Is CVE-2026-85101 in your network?

This page tells you how dangerous CVE-2026-85101 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 13 Nov 2026, not the live upstream state.