Buffer overflow in Checkpoint Quantum Security Gateway
CVE-2026-48131
The VPN service may mishandle an unexpected IKE fragment value received on the IKE port 500/UDP during the early stage of a connection attempt. This can cause the service to terminate unexpectedly, resulting in denial of service (temporary disruption of VPN-related functionality).
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (33.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.027 · newest: 0.004 · change: -0.023
Affected products
- Checkpoint Quantum Security Gateway — versions R82.10 with Jumbo Hotfix Take 6 or below, R82 with Jumbo Hotfix Take 91 or below, R81.20 with Jumbo Hotfix Take 127 or below
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-48131?
- CVE-2026-48131 is a high-severity vulnerability in Checkpoint Quantum Security Gateway, classified under Heap-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-05-26.
- How severe is CVE-2026-48131?
- High severity. CVSS v3 base score is 8.1 out of 10.