CVE-2026-50752

HIGH

Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1

Title source: cna
STIX 2.1

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.

References (1)

Core 1

Scores

CVSS v3 7.4
EPSS 0.0425
EPSS Percentile 89.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-295
Status published
Products (5)
checkpoint/Quantum Security Gateway R81.10, R81, and R80.40
checkpoint/Quantum Security Gateway R81.20 with Jumbo Hotfix Take 141 or below
checkpoint/Quantum Security Gateway R82 with Jumbo Hotfix Take 103 or below
checkpoint/Quantum Security Gateway R82.10 with Jumbo Hotfix Take 19 or below
checkpoint/Spark Firewalls R80.20.X, R81.10.X, and R82.00.X
Published Jun 08, 2026
Tracked Since Jun 08, 2026