CVE-2026-50752

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

State: Published
Severity: 7.4 High
Published: Jun 8, 2026
Updated: Jun 10, 2026
Reserved: Jun 7, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.4 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N	checkpoint

Weaknesses

CWE-295 Improper Certificate Validation.

Affected Products

Product	Versions
Quantum Security Gatewaycheckpoint	R82.10 with Jumbo Hotfix Take 19 or belowAffected R82 with Jumbo Hotfix Take 103 or belowAffected R81.20 with Jumbo Hotfix Take 141 or belowAffected R81.10, R81, and R80.40Affected
Spark Firewallscheckpoint	R80.20.X, R81.10.X, and R82.00.XAffected

References

https://support.checkpoint.com/results/sk/sk185035

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