CVE Catalog

CVE-2026-48131

HighCVSS 8.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

High risk
2.66%

84th percentile - higher than 84% of all known CVEs

Summary

The VPN service mishandles an unexpected IKE fragment value on port 500/UDP during early connection setup, causing the service to terminate unexpectedly and temporarily disrupting VPN functionality.

Risk Assessment

An attacker can remotely crash the VPN service, causing temporary loss of connectivity and availability for the organization's users.

Recommendation

Apply the patch provided by the VPN software vendor. If unavailable, temporarily restrict access to port 500/UDP from trusted sources only.

Related vulnerabilities

Original NVD description (English source)

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 data from NVD (NIST) · CISA KEV · EPSS