Review reviewHigh

CVE-2026-48131

checkpoint Quantum Security Gateway

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).

CVSS
8.1
EPSS
2.66%
84.2% percentile
CISA KEV
Not listed
Published
2026.05.26
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability2.66%
Technical severityCVSS 8.1

Vulnerability overview

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).

Affected product and versions

Product
checkpoint Quantum Security Gateway
Affected 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, >= All releases from R81.10 and below
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that checkpoint Quantum Security Gateway and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-122