# CVE-2026-50752 — checkpoint Quantum Security Gateway

> As of 2026-06-10, CVE-2026-50752 is a HIGH-severity vulnerability in checkpoint Quantum Security Gateway, CVSS v3.1 7.4, EPSS 0.2% (16.2th percentile). Threadlinqs Intelligence links 3 tracked threat campaigns to CVE-2026-50752, most recently “Qilin Ransomware Suspect Arrested in Japan, Extradited to Germany; Qilin Affiliate Exploited Check Point VPN Zero-Day CVE-2026-50751”.

**Last updated:** 2026-06-10

## What is CVE-2026-50752?

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.

The record classifies CVE-2026-50752 under weakness class [CWE-295](https://intel.threadlinqs.com/cwe/CWE-295). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 146 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.4 — HIGH (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 16.2% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-06-08, last modified 2026-06-10

## Is CVE-2026-50752 being exploited?

It currently carries a trending score of 19 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [checkpoint](https://intel.threadlinqs.com/vendors/checkpoint): Quantum Security Gateway, Spark Firewalls

## How to fix CVE-2026-50752

No vendor patch reference has been recorded for CVE-2026-50752 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-50752

3 tracked threats in the Threadlinqs corpus reference CVE-2026-50752, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Qilin Ransomware Suspect Arrested in Japan, Extradited to Germany; Qilin Affiliate Exploited Check Point VPN Zero-Day CVE-2026-50751](https://intel.threadlinqs.com/threat/TL-2026-3004) — HIGH · 2026-10-07
- [2026 Ransomware Surge Targeting US Organizations: Identity-First Compromise, BYOVD, and Living-Off-the-Cloud Exfiltration (Qilin, Akira, Clop, INC Ransom, Play, DragonForce, Sinobi)](https://intel.threadlinqs.com/threat/TL-2026-2125) — HIGH · 2026-08-23
- [Check Point Remote Access & Mobile Access VPN IKEv1 Authentication Bypass (CVE-2026-50751) Exploited by Qilin Ransomware Affiliate](https://intel.threadlinqs.com/threat/TL-2026-0718) — CRITICAL · 2026-06-08

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-10. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [support.checkpoint.com](https://support.checkpoint.com/results/sk/sk185035)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-50752
Full detection coverage and IOCs for threats exploiting CVE-2026-50752 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp