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High severity8.1NVD Advisory· Published Apr 10, 2026· Updated May 29, 2026

CVE-2021-47961

CVE-2021-47961

Description

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.

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Affected products

2
  • Synology/SSL VPN Client2 versions
    cpe:2.3:a:synology:ssl_vpn_client:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:synology:ssl_vpn_client:*:*:*:*:*:*:*:*range: <1.4.5-0684
    • (no CPE)range: <1.4.5-0684

Patches

Vulnerability mechanics

References

1

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