Check Point Quantum Security Gateway/Spark Firewalls IKEv1 Key Exchange improper authentication

Summaryinfo

A vulnerability marked as critical has been reported in Check Point Quantum Security Gateway and Spark Firewalls. The affected element is an unknown function of the component IKEv1 Key Exchange Handler. Performing a manipulation results in improper authentication. This vulnerability is reported as CVE-2026-50751. The attack is possible to be carried out remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability was found in Check Point Quantum Security Gateway and Spark Firewalls (the affected version is unknown). It has been classified as critical. This affects an unknown code of the component IKEv1 Key Exchange Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key exchange allows an unauthenticated remote attacker to bypass user authentication and establish a remote access VPN connection without a valid user password.

The advisory is shared at support.checkpoint.com. This vulnerability is uniquely identified as CVE-2026-50751 since 06/07/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but an exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/08/2026).

It is declared as attacked. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 06/08/2026 with a due date of 06/11/2026:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-35047). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• Check Point

Name

• Quantum Security Gateway
• Spark Firewalls

License

• commercial

Website

• Vendor: https://www.checkpoint.com/

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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