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CVE-2021-47961

HIGH CVSS 3.1: 8.1 EPSS 0.04%
Updated Apr 10, 2026
Synology
Parameter Value
CVSS 8.1 (HIGH)
Affected Versions before 1.4.5
Type CWE-256
Vendor Synology
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1

Weakness Type (CWE)