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TI-2021-22573 Aliases CVE-2021-47960GHSA-frr3-hpw2-j7cq

A files or directories accessible to external parties vulnerability in Synology SSL VPN…

Priority LOW 28CWE-552Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-552.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00191 8th percentileScored 2026-11-07
Fix Fixed Synology SSL VPN Client (Synology): 1.4.5-0684

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SynologySynology SSL VPN Clientbefore 1.4.5-06841.4.5-0684Patch availableCNA
  • Synology SSL VPN Client VendorSynology Affected before 1.4.5-0684 Fixed in 1.4.5-0684 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:synology:ssl_vpn_client:*:*:*:*:*:*:*:*before 1.4.5-0684VulnerableSynology
  • cpe:2.3:a:synology:ssl_vpn_client:*:*:*:*:*:*:*:* Versions before 1.4.5-0684 Vulnerable ·Synology

Remediation

  • Fix · CNA Synology SSL VPN Client (Synology) Fixed in 1.4.5-0684

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Synology SSL VPN Client — Synology-SA-26:05 Synology SSL VPN Client

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2021-22574 A plaintext storage of a password vulnerability in Synology SSL VPN Client before…Priority LOW 37
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-47960
  2. 2026-10-03 Alias added: GHSA-frr3-hpw2-j7cq

References

Advisory 1

  • TI-2018-09531 Lack of administrator control over security vulnerability in client.cgi in Synology SSL… CVSS 3.0HIGH 8.8
  • TI-2021-22574 A plaintext storage of a password vulnerability in Synology SSL VPN Client before… CVSS 3.1HIGH 8.1
  • TI-2018-06467 Cleartext transmission of sensitive information in Synology SSL VPN Client CVSS 3.0HIGH 8.1
  • TI-2023-05287 Buffer overflow in Synology SSL VPN Client CVSS 3.1MEDIUM 5.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences