SB2026060932 - MitM attack in Check Point Gaia IKEv1 implementation

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Main Vulnerability Database SB2026060932

SB2026060932 - MitM attack in Check Point Gaia IKEv1 implementation

Published: June 9, 2026

Security Bulletin ID SB2026060932
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Certificate Validation (CVE-ID: CVE-2026-50752)

CWE-ID: CWE-295 - Improper Certificate Validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to conduct a man-in-the-middle attack.

The vulnerability exists due to improper certificate validation in the IKEv1 key exchange certificate validation logic when establishing a VPN site-to-site connection using certificate-based authentication. A remote attacker can present a crafted certificate to conduct a man-in-the-middle attack.

The issue applies only to VPN site-to-site configurations that use IKEv1 with certificate-based authentication, and does not affect pre-shared key authentication, Dynamic IP gateways, or Large Scale VPN communities.


Remediation

Install update from vendor's website.

References