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    CVE-2021-26565

    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 obtain sensitive information via an HTTP session.

    Published:Feb 26, 2021
    Last Modified:Jan 14, 2025
    EPS:Feb 26, 2021
    EPSS Score:0.00182
    CVSS Score:8.3

    Affected Products

    Vendor
    Synology
    Product
    Diskstation Manager
    Vendor
    Synology
    Product
    Diskstation Manager Unified Controller
    Vendor
    Synology
    Product
    Skynas
    Vendor
    Synology
    Product
    Skynas Firmware
    Vendor
    Synology
    Product
    Uc3200
    Vendor
    Synology
    Product
    Vs960hd
    Vendor
    Synology
    Product
    Vs960hd Firmware

    Exploits

    https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1160https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1160

    Related CVEs

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    CVE-2025-13392 (CVSS 8.1) — Improper check for unusual or exceptional conditions vulnerability in SSO in Synology DiskStation Manager (DSM…
    CVE-2025-13167 (CVSS 5.4) — Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in contact …
    CVE-2024-47272 (CVSS 2.7) — Incorrect authorization vulnerability in IO Module functionality in Synology Surveillance Station before 9.2.2…
    CVE-2024-47271 (CVSS 4.9) — Insufficiently protected credentials vulnerability in IPSpeaker component in Synology Surveillance Station bef…
    CVE-2024-47270 (CVSS 2.7) — Improper preservation of permissions vulnerability in Archiving Push functionality in Synology Surveillance St…
    CVE-2024-47269 (CVSS 4.9) — Cleartext transmission of sensitive information vulnerability in Export Key functionality in Synology Surveill…
    CVE-2024-47268 (CVSS 4.9) — Missing authorization vulnerability in AddOns functionality in Synology Surveillance Station before 9.2.2-1157…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High