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. 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: 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 — 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) — HIGH · 2026-08-23
- Check Point Remote Access & Mobile Access VPN IKEv1 Authentication Bypass (CVE-2026-50751) Exploited by Qilin Ransomware Affiliate — CRITICAL · 2026-06-08
Sources
Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.