Certificate validation bypass in Check Point IKEv1 site-to-site VPN
CVE-2026-50752 is a vulnerability in the certificate validation logic of Check Point's deprecated IKEv1 key exchange implementation affecting Security Gateways and Spark Firewall products. Under certain IKEv1 site-to-site VPN configurations that use certificate-based authentication, an unauthenticated attacker in a man-in-the-middle position may be able to bypass certificate validation during VPN establishment. The flaw is described as residing in the same legacy IKEv1 code path investigated during analysis of CVE-2026-50751. Successful exploitation could undermine trust in the peer certificate presented during tunnel negotiation and enable adversary interference with site-to-site VPN communications.
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Impact, mitigation & remediation
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Impact
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Mitigation
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Exploits
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Affected products & vendors
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Recent activity
30 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Check Point IKEv1 vulnerability enabling man-in-the-middle attacks against site-to-site VPN tunnels under certain configurations.
An additional certificate-validation flaw in Check Point products mentioned alongside CVE-2026-50751 as requiring hotfixes.
A secondary Check Point VPN vulnerability that could enable a man-in-the-middle attack against site-to-site VPN tunnels.
A certificate validation vulnerability in Check Point's deprecated IKEv1 implementation that could enable man-in-the-middle interference with site-to-site VPN communications.
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Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.