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    CVE-2025-11955

    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.

    Published:Oct 27, 2025
    Last Modified:Apr 15, 2026
    EPS:Oct 27, 2025
    EPSS Score:0.00032
    CVSS Score:8.2

    Affected Products

    Vendor
    Microsoft
    Product
    Windows
    Vendor
    Thegreenbow
    Product
    Ipsec Vpn Client
    Vendor
    Thegreenbow
    Product
    Thegreenbow Vpn Client
    Vendor
    Thegreenbow
    Product
    Vpn Client Linux
    Vendor
    Thegreenbow
    Product
    Windows Enterprise Certified Vpn
    Vendor
    Thegreenbow
    Product
    Windows Enterprise Vpn

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High