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CVE-2025-11955

Incorrect validation of OCSP certificates in TheGreenBow VPN Client Windows Enterprise

HIGH
8.2
CVSS Score
Published: October 27, 2025 at 11:30 AM UTC
Updated: October 8, 2026 at 11:10 AM UTC
1 product affected across 1 vendorWindows Enterprise VPN

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Severity
HIGH8.2
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Source: cverecord
https://www.incibe.es/en/incibe-cert/notices/aviso/incorrect-validation-ocsp-certificates-thegreenbow-vpn-client-windows
Vendor AdvisoryPatch
Source: cverecord
https://www.thegreenbow.com/en/support/security-alerts/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHINCIBE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-299

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