CVE-2021-26560

CRITICAL

Synology Diskstation Manager < 6.2.3-25426-3 - Cleartext Transmission

Title source: rule

Description

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

References (2)

Scores

CVSS v3 9.0
EPSS 0.0016
EPSS Percentile 37.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Classification

CWE
CWE-319
Status published

Affected Products (4)

synology/diskstation_manager < 6.2.3-25426-3
synology/vs960hd_firmware
synology/skynas_firmware
synology/diskstation_manager_unified_controller

Timeline

Published Feb 26, 2021
Tracked Since Feb 18, 2026