Vulnerability in Checkpoint Quantum Security Gateway
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.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (16.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.050 · newest: 0.003 · change: -0.047
Affected products
- Checkpoint Quantum Security Gateway — versions R82.10 with Jumbo Hotfix Take 19 or below, R82 with Jumbo Hotfix Take 103 or below, R81.20 with Jumbo Hotfix Take 141 or below
- Checkpoint Spark Firewalls — versions R80.20.X, R81.10.X, and R82.00.X
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-50752?
- CVE-2026-50752 is a high-severity vulnerability in Checkpoint Quantum Security Gateway, classified under Improper Certificate Validation. CVSS score: 7.4/10. Published 2026-06-08.
- How severe is CVE-2026-50752?
- High severity. CVSS v3 base score is 7.4 out of 10.