CVE-2026-48132: VPN service may restart unexpectedly when processing IKE traffic over NAT-T 4500/UDP

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-26 · updated 2026-07-24
Weakness: CWE-125

Description

The Security Gateway does not correctly validate a length value in certain IKE packets when NAT-T is used (4500/UDP). As a result, a specially crafted or malformed packet can cause the VPN processing service to terminate unexpectedly, leading to denial of service (temporary interruption of VPN negotiations/traffic).

Affected products

Check Point Quantum Security Gateway: through R82.10 with Jumbo Hotfix Take 6; through R82 with Jumbo Hotfix Take 91; through R81.20 with Jumbo Hotfix Take 127; through All releases from R81.10

References

https://support.checkpoint.com/results/sk/sk184982

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