# CVE-2026-50752: Check Point VPN certificate validation bypass in IKEv1

Source: https://junglewise.ai/threats/cve-2026-50752-check-point-vpn-certificate-validation-bypass-in-ikev1  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-08. Updated: 2026-06-08  
License: CC BY 4.0 with a link back

CVE-2026-50752 · Severity: high · CVSS 7.4 · Published 2026-06-08

A security flaw exists in the way certain Check Point VPN connections verify digital certificates when using the older IKEv1 protocol. This vulnerability could allow an attacker positioned between two offices to impersonate a legitimate site and bypass security checks. If exploited, the attacker could intercept, read, or modify sensitive data traveling through the encrypted tunnel, potentially compromising confidential business communications.

Vendors: [Check Point](https://junglewise.ai/threats/vendors/check-point).

## Quick answers

**Is CVE-2026-50752 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-50752 being exploited in the wild.

**How severe is CVE-2026-50752?** High severity, with a CVSS score of 7.4, published 8 June 2026.

**Which products and versions are affected?** Check Point VPN site-to-site connections IKEv1 key exchange implementation.

**Is there a fix for CVE-2026-50752?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-50752 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-50752?** Check whether you run Check Point VPN site-to-site connections at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This vulnerability is classified as improper certificate validation (CWE-295) within the deprecated IKEv1 key exchange logic. An unauthenticated attacker with a man-in-the-middle (MitM) network position can exploit this flaw to bypass certificate-based authentication in site-to-site VPN tunnels. The root cause is a failure in the validation logic that allows the attacker to present a certificate that is not properly verified against the expected identity. Successful exploitation grants the ability to decrypt or alter traffic traversing the VPN. Users are advised to migrate to IKEv2 or apply vendor-provided updates.

## Affected products

- Check Point VPN site-to-site connections IKEv1 key exchange implementation

## Timeline

- 2026-06-08: disclosed
- 2026-06-08: advisory

## References

- [https://support.checkpoint.com/results/sk/sk185035](https://support.checkpoint.com/results/sk/sk185035)