PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-50752 checkpoint CVE debrief

CVE-2026-50752 is a HIGH severity vulnerability with a CVSS score of 7.4. The vulnerability is related to a weakness in the certificate validation logic of the deprecated IKEv1 key exchange, which 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.

Vendor
checkpoint
Product
Quantum Security Gateway
CVSS
HIGH 7.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-07-23
Advisory published
2026-06-08
Advisory updated
2026-07-23

Who should care

Administrators and users of VPN site-to-site connections that use certificate-based authentication, particularly those using deprecated IKEv1 key exchange, should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by a weakness in the certificate validation logic of the deprecated IKEv1 key exchange. This weakness 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.

Defensive priority

HIGH

Recommended defensive actions

  • Update VPN configurations to use IKEv2 or other secure key exchange protocols.
  • Implement proper certificate validation and authentication mechanisms.
  • Monitor VPN connections for suspicious activity.

Evidence notes

The vendor of this product is currently listed as 'Unknown Vendor'. However, there is evidence suggesting that the vendor might be Checkpoint.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50752 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50752

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-50752 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50752

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.