CVE-2021-26564

HighCVSS 8.7/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 8.7/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Weakness enumeration

CWE-319

Affected software

VendorProductVersions
SynologySynology DiskStation Manager (DSM)>= unspecified, < 6.2.3-25426-3

References

Timeline

Published
Feb 26, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

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CVE-2021-26564: High severity, CVSS 8.7 | Vulnix