CVE-2026-48132 VPN service may restart unexpectedly when processing IKE traffic over NAT-T 4500/UDP
A remote attacker can cause a denial of service in Check Point Security Gateways by sending malformed IKE packets over NAT-T UDP port 4500.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-48132?
CVE-2026-48132 is a high-severity denial of service vulnerability in checkpoint Quantum Security Gateway, published on 26 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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).
Weakness: CWE-125
Which versions are affected by CVE-2026-48132?
How do I fix CVE-2026-48132?
No fix has been published for CVE-2026-48132 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-48132 being exploited?
There is no known exploitation of CVE-2026-48132 in the wild and no public exploit code.
Sources
Also known as GHSA-3h9p-9pvw-73vm.