Is CVE-2021-47960 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2021-47960, but active exploitation has not been confirmed.

Can CVE-2021-47960 be exploited remotely?

Yes. CVE-2021-47960 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-47960?

CVE-2021-47960 has a CVSS score of 6.5 (MEDIUM).

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MEDIUMPOC

CVE-2021-47960

CWE-552Published: April 10, 2026· Updated: Apr 13, 2026

6.5

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:8.0th

Official Description

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.

NVD Source

Technical Analysis

CVE-2021-47960 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

A proof-of-concept (PoC) exploit exists for CVE-2021-47960. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.