7.4High

CVE-2026-50752Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1

checkpoint Quantum Security Gateway; checkpoint Spark Firewalls Published: (5 months ago)

Description

A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel.

Weakness (CWE): CWE-295

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

VendorProductVersions
checkpoint Quantum Security Gateway R82.10 with Jumbo Hotfix Take 19 or below, R82 with Jumbo Hotfix Take 103 or below, R81.20 with Jumbo Hotfix Take 141 or below, R81.10, R81, and R80.40
checkpoint Spark Firewalls R80.20.X, R81.10.X, and R82.00.X

References and patches