High severity · published Jun 8, 2026
CVE-2026-50752
Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1
7.4
CVSS
5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.0% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QS
Quantum Security Gateway · Check Point
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 · source: vendor
SF
Spark Firewalls · checkpoint
R80.20.X, R81.10.X, and R82.00.X · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-50752
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-50752
support.checkpoint.com
https://support.checkpoint.com/results/sk/sk185035
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