CVE-2021-47961

HIGH 8.1

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

A plaintext storage of a password vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access or influence the user's PIN code due to insecure storage. This may lead to unauthorized VPN configuration and potential interception of subsequent VPN traffic when combined with user interaction.

CWE	CWE-256
Vendor	synology
Product	synology ssl vpn client
Published	Apr 10, 2026
Last Updated	Apr 10, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

Synology / Synology SSL VPN Client

* < 1.4.5-0684

References

NVD ↗ CVE.org ↗ EPSS Data ↗

synology.com: https://www.synology.com/en-global/security/advisory/Synology_SA_26_05

Credits

Laurent Sibilla (https://www.linkedin.com/in/lsibilla/)