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CVE-2021-47961

Quick assessment

Affected
Synology Synology SSL VPN Client
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Synology SSL VPN Client是中国群晖（Synology）公司的一款用于安全连接Synology NAS的VPN客户端软件。 Synology SSL VPN Client 1.4.5-0684之前版本存在安全漏洞，该漏洞源于密码明文存储不当，可能导致远程攻击者访问或影响用户PIN码，造成未经授权的VPN配置和潜在流量拦截。

CVSS 8.1 · High EPSS 0.32% · P24

Possible ATT&CK Techniques 1 AI

T1552.004 · Private Keys
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I. Basic Information for CVE-2021-47961

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
明文存储口令
Source: CVE Program / CVE List V5
Vulnerability Title
Synology SSL VPN Client 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Synology SSL VPN Client是中国群晖（Synology）公司的一款用于安全连接Synology NAS的VPN客户端软件。 Synology SSL VPN Client 1.4.5-0684之前版本存在安全漏洞，该漏洞源于密码明文存储不当，可能导致远程攻击者访问或影响用户PIN码，造成未经授权的VPN配置和潜在流量拦截。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Synology Synology SSL VPN Client * ~ 1.4.5-0684 -

II. Public POCs for CVE-2021-47961

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III. Intelligence Information for CVE-2021-47961

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Vendor Advisories for CVE-2021-47961 (1)

IV. Related Vulnerabilities

Same product: Synology SSL VPN Client
Same vendor: Synology
Same weakness: CWE-256