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

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-50752
StatePUBLISHED
Assignercheckpoint
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-08 12:16:32 UTC
Updated2026-06-08 14:57:49 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 7.4 HIGH from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS: 0.000310000 probability, percentile 0.095090000 (date 2026-06-09)

Problem Types: CWE-295 | CWE-295 CWE-295: Improper Certificate Validation.

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1CNACVSS7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Checkpoint Quantum Security Gateway affected R82.10 with Jumbo Hotfix Take 19 or below Not specified
CNA Checkpoint Quantum Security Gateway affected R82 with Jumbo Hotfix Take 103 or below Not specified
CNA Checkpoint Quantum Security Gateway affected R81.20 with Jumbo Hotfix Take 141 or below Not specified
CNA Checkpoint Quantum Security Gateway affected R81.10, R81, and R80.40 Not specified
CNA Checkpoint Spark Firewalls affected R80.20.X, R81.10.X, and R82.00.X Not specified

References

ReferenceSourceLinkTags
support.checkpoint.com/results/sk/sk185035 [email protected] support.checkpoint.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report