Traffic interception and modification via IKEv1 certificate bypass
Published Jun 8, 2026 · Updated Jun 8, 2026
Improper certificate validation in Check Point Quantum and Spark gateways allows man-in-the-middle attackers to intercept or modify VPN traffic. The vendor identifies the locus only as deprecated IKEv1 certificate-validation logic and has not disclosed the erroneous code path or validation check. Exposure requires an IKEv1 site-to-site VPN using certificate authentication; pre-shared keys, Dynamic IP gateways, and Large Scale VPN communities are unaffected.
Summary
What happened
Improper certificate validation in Check Point Quantum and Spark gateways allows man-in-the-middle attackers to intercept or modify VPN traffic. The vendor identifies the locus only as deprecated IKEv1 certificate-validation logic and has not disclosed the erroneous code path or validation check. Exposure requires an IKEv1 site-to-site VPN using certificate authentication; pre-shared keys, Dynamic IP gateways, and Large Scale VPN communities are unaffected.
The record
- CVE
- CVE-2026-50752
- Published
- Jun 8, 2026
- Updated
- Jun 8, 2026
- Vendor
- Check Point Software Technologies Ltd.
- Product
- Quantum Security Gateway
- Classifications
- CWE-295, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 8, 2026CVE publishedPublication date reported by the CVE source.
- Jun 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=R81.10, R81, and R80.40
- Affected versionversion=R81.20 with Jumbo Hotfix Take 141 or below
- Affected versionversion=R82.10 with Jumbo Hotfix Take 19 or below
- Affected versionversion=R82 with Jumbo Hotfix Take 103 or below
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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