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TI-2020-16771 Aliases CVE-2020-27656GHSA-8mf3-6333-x5rm

Cleartext transmission of sensitive information in Synology DiskStation Manager

Priority LOW 30CWE-319Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-319.

Summary

Cleartext transmission of sensitive information vulnerability in DDNS in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to eavesdrop authentication information of DNSExit via unspecified vectors.

Why it matters now

EPSS 0.00547 46th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed DiskStation Manager (DSM) (Synology): 6.2.3-25426-2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
SynologyDiskStation Manager (DSM)before 6.2.3-25426-26.2.3-25426-2Patch availableCNA
  • DiskStation Manager (DSM) VendorSynology Affected before 6.2.3-25426-2 Fixed in 6.2.3-25426-2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:*6.2 to before 6.2.3-25426-2VulnerableSynology
  • cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:* Versions 6.2 to before 6.2.3-25426-2 Vulnerable ·Synology

Remediation

  • Fix · CNA DiskStation Manager (DSM) (Synology) Fixed in 6.2.3-25426-2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Synology DiskStation Manager (DSM) 6.2.3-25426-2

    4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2020-16763 Improper certificate validation in Synology DiskStation ManagerPriority MEDIUM 40
    • TI-2020-16767 Broken or risky cryptographic algorithm in Synology DiskStation ManagerPriority LOW 38
    • TI-2020-16765 Synology DiskStation Manager (DSM) before 6.2.3-25426-2 does not set the Secure flag for…Priority LOW 27
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-27656
  2. 2026-10-03 Alias added: GHSA-8mf3-6333-x5rm

References

Exploit 1

Advisory 1

  • TI-2021-02242 Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer… KEVCVSS 3.1HIGH 7.8
  • TI-2018-01076 Out-of-bounds write in Netatalk CVSS 3.1CRITICAL 9.8
  • TI-2017-10594 Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a… CVSS 3.1CRITICAL 9.8
  • TI-2013-05716 webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2… CVSS 2.0HIGH 10.0
  • TI-2021-19843 Out-of-bounds read in Samba CVSS 3.1HIGH 8.8
  • TI-2017-11636 Command injection in Synology DiskStation Manager CVSS 3.0HIGH 8.8
See all 96 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences