CVE-2026-48131

High

Published: 26 May 2026

Published

26 May 2026

Modified

26 May 2026

KEV Added

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Patch

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CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0266 83.8th percentile

Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-48131 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Checkpoint (inferred from references). Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 16.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-31818

Vulnerability details

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).

CWE(s): CWE-122

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1499 Endpoint Denial of Service Impact

Adversaries may perform Endpoint Denial of Service (DoS) attacks to degrade or block the availability of services to users.

attack.mitre.org →

Why these techniques?

CVE enables remote DoS against public-facing VPN (IKE on UDP 500) via crafted fragments, directly mapping to public-app exploitation and endpoint DoS.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0