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CVE-2025-11955— Incorrect validation of OCSP certificates in TheGreenBow VPN Client Windows Enterprise

Quick assessment

Affected
TheGreenBow TheGreenBow VPN Client Windows Enterprise
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.

TheGreenBow VPN是法国TheGreenBow公司的一个VPN客户端软件。 TheGreenBow VPN 7.5版本和7.6版本存在安全漏洞，该漏洞源于OCSP证书验证不正确，可能导致建立不安全的VPN隧道。

AI Predicted 8.1 Difficulty: Easy EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-11955

Vulnerability Information
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Vulnerability Title
Incorrect validation of OCSP certificates in TheGreenBow VPN Client Windows Enterprise
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect validation of OCSP certificates vulnerability in TheGreenBow VPN, versions 7.5 and 7.6. During the IKEv2 authentication step, the OCSP-enabled VPN client establishes the tunnel even if it does not receive an OCSP response or if the OCSP response signature is invalid.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书撤销验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
TheGreenBow VPN 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TheGreenBow VPN是法国TheGreenBow公司的一个VPN客户端软件。 TheGreenBow VPN 7.5版本和7.6版本存在安全漏洞，该漏洞源于OCSP证书验证不正确，可能导致建立不安全的VPN隧道。
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
TheGreenBow TheGreenBow VPN Client Windows Enterprise 7.5 -

II. Public POCs for CVE-2025-11955

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III. Intelligence Information for CVE-2025-11955

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Vendor Pages for CVE-2025-11955 (1)

IV. Related Vulnerabilities

Same weakness: CWE-299