CVE-2021-47961NVD

Vulnerability Summary

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.

Severity Level

HIGH(8.1)

Published Date

Apr 10, 2026

Last Modified

May 29, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.32%Probability

Root Weakness (CWE)

CWE-256: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v3.1 Base Metrics — Score 8.1 (HIGH)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

Affected & Patched Versions

Affected Versions

Synology Ssl Vpn Client < 1.4.5-0684

Patched Versions

Synology Ssl Vpn Client 1.4.5-0684

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