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High8.1Synology

High [CVE-2021-47960 +1] files or directories accessible to external parties vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access files within the installation directory via a local HTTP server bound to the loopback interface

This high-severity Synology advisory covers CVE-2021-47960 and CVE-2021-47961 affecting Synology SSL VPN Client.

Synology-SA-26:05 Published Apr 10, 2026Updated by vendor Jun 17, 2026
Affected products & platforms
SynologySSL VPN Client
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Summary

A files or directories accessible to external parties vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access files within the installation directory via a local HTTP server bound to the loopback interface.

By leveraging user interaction with a crafted web page, attackers may retrieve sensitive files such as configuration files, certificates, and logs, leading to information disclosure.

Affected versions
  • before 1.4.5-0684

Official advisory · high-confidence parse· fetched 1 month ago·verify at source

Fixed versions
  • 1.4.5-0684

Official advisory · high-confidence parse· fetched 1 month ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Upgrade the affected Synology product to a fixed release: 1.4.5-0684.

Official advisory · high-confidence parse· fetched 1 month ago·verify at source

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