Review reviewHigh

CVE-2026-50752

checkpoint Quantum Security Gateway, Spark Firewalls

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.

CVSS: 7.4
EPSS: 4.55%
CISA KEV: Not listed
Published: 2026.06.08

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability4.55%

Technical severityCVSS 7.4

Vulnerability overview

Affected product and versions

Product: checkpoint Quantum Security Gateway, Spark Firewalls
Affected versions: >= 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, >= R80.20.X, R81.10.X, and R82.00.X
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that checkpoint Quantum Security Gateway, Spark Firewalls and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE: CWE-295