What is CVE-2021-26566?

CVE-2021-26566 is a vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 that allows man-in-the-middle attackers to execute arbitrary commands via inbound QuickConnect traffic.

What software is affected by CVE-2021-26566?

The software affected by CVE-2021-26566 is Synology DiskStation Manager (DSM) before version 6.2.3-25426-3.

What is the severity of CVE-2021-26566?

CVE-2021-26566 has a severity value of 9, indicating it is critical.

How can the vulnerability in CVE-2021-26566 be exploited?

The vulnerability in CVE-2021-26566 can be exploited by man-in-the-middle attackers through inbound QuickConnect traffic.

Where can I find more information about CVE-2021-26566?

You can find more information about CVE-2021-26566 in the Synology security advisory and the Talos Intelligence vulnerability report.

Vulnerability/
CVE-2021-26566

critical

CWE

200 201

26/2/2021

24/10/2022

CVE-2021-26566: Infoleak

First published: Fri Feb 26 2021(Updated: )

Insertion of sensitive information into sent data vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to execute arbitrary commands via inbound QuickConnect traffic.

Credit: security@synology.com

Affected Software	Affected Version	How to fix
Synology DiskStation Manager	<6.2.3-25426-3
Synology Vs960hd Firmware
Synology Vs960hd
Synology Skynas Firmware
Synology Skynas
Synology Diskstation Manager Unified Controller	=3.0
Synology Uc3200

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Frequently Asked Questions

What is CVE-2021-26566?
CVE-2021-26566 is a vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 that allows man-in-the-middle attackers to execute arbitrary commands via inbound QuickConnect traffic.
What software is affected by CVE-2021-26566?
The software affected by CVE-2021-26566 is Synology DiskStation Manager (DSM) before version 6.2.3-25426-3.
What is the severity of CVE-2021-26566?
CVE-2021-26566 has a severity value of 9, indicating it is critical.
How can the vulnerability in CVE-2021-26566 be exploited?
The vulnerability in CVE-2021-26566 can be exploited by man-in-the-middle attackers through inbound QuickConnect traffic.
Where can I find more information about CVE-2021-26566?
You can find more information about CVE-2021-26566 in the Synology security advisory and the Talos Intelligence vulnerability report.

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vendor/synology
canonical/synology diskstation manager
canonical/synology vs960hd firmware
canonical/synology vs960hd
canonical/synology skynas firmware
canonical/synology skynas
canonical/synology diskstation manager unified controller
version/synology diskstation manager unified controller/3.0
canonical/synology uc3200

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