Vulnerability · Published Oct 27, 2025 · Assigned by INCIBE
CVE-2025-11955Incorrect validation of OCSP certificates in TheGreenBow VPN Client Windows Enterprise
High 8.2
In plain English
A high-severity security flaw in TheGreenBow VPN Client Windows Enterprise from TheGreenBow. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).
Severity (CVSS 4.0)8.2High
Exploit odds (30 days)0.2%top 88.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| TheGreenBow | TheGreenBow VPN Client Windows Enterprise | 7.57.6 |
Weakness: CWE-299 · Vector: 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