How severe is CVE-2026-48131?

CVE-2026-48131 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-48131 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-48131?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-48131 have an EU (EUVD) identifier?

Yes. CVE-2026-48131 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31818.

When was CVE-2026-48131 published?

CVE-2026-48131 was published on 2026-05-26 and last updated on 2026-06-17.

CVE-2026-48131

CVE-2026-48131 is a high-severity vulnerability with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31818
Weakness: CWE-122
Published: 2026-05-26
Last modified: 2026-06-17

Description

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).

Frequently asked questions

What is CVE-2026-48131?: 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).
How severe is CVE-2026-48131?: CVE-2026-48131 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-48131 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-48131?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-48131 have an EU (EUVD) identifier?: Yes. CVE-2026-48131 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31818.
When was CVE-2026-48131 published?: CVE-2026-48131 was published on 2026-05-26 and last updated on 2026-06-17.

References

https://support.checkpoint.com/results/sk/sk184981

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