8.7
CWE
319
Advisory Published
Updated

CVE-2021-26564

First published: Fri Feb 26 2021(Updated: )

Cleartext transmission of sensitive information vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to spoof servers via an HTTP session.

Credit: security@synology.com

Affected SoftwareAffected VersionHow 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-2021-26564?

    CVE-2021-26564 is a vulnerability that allows man-in-the-middle attackers to spoof servers via an HTTP session.

  • How severe is CVE-2021-26564?

    CVE-2021-26564 has a severity score of 8.7, which is classified as high severity.

  • What software is affected by CVE-2021-26564?

    Synology DiskStation Manager (DSM) before 6.2.3-25426-3 and Synology Vs960hd Firmware are affected by CVE-2021-26564.

  • How can man-in-the-middle attacks be prevented?

    To prevent man-in-the-middle attacks, ensure that you are using secure protocols such as HTTPS, regularly update your software and devices, and use strong and unique passwords.

  • Where can I find more information about CVE-2021-26564?

    You can find more information about CVE-2021-26564 at the official Synology security advisory (https://www.synology.com/security/advisory/Synology_SA_20_26) and the Talos Intelligence vulnerability report (https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1160).

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