How severe is CVE-2026-0243?

CVE-2026-0243 has a CVSS 4.0 base score of 4.9, rated medium severity.

Is CVE-2026-0243 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-0243?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-0243 have an EU (EUVD) identifier?

Yes. CVE-2026-0243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30135.

When was CVE-2026-0243 published?

CVE-2026-0243 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-0243

CVE-2026-0243 is a medium-severity vulnerability with a CVSS 4.0 base score of 4.9. 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-606.

Key facts

Severity: Medium (CVSS 4.0 base score 4.9)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30135
Weakness: CWE-606
Published: 2026-05-13
Last modified: 2026-06-17

Description

A denial of service (DoS) vulnerability in Palo Alto Networks Prisma SD-WAN ION devices enables an unauthenticated attacker in a network adjacent to a Prisma SD-WAN ION device to cause a system disruption by sending a specially crafted IPv6 packet.

Frequently asked questions

What is CVE-2026-0243?: A denial of service (DoS) vulnerability in Palo Alto Networks Prisma SD-WAN ION devices enables an unauthenticated attacker in a network adjacent to a Prisma SD-WAN ION device to cause a system disruption by sending a specially crafted IPv6 packet.
How severe is CVE-2026-0243?: CVE-2026-0243 has a CVSS 4.0 base score of 4.9, rated medium severity.
Is CVE-2026-0243 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-0243?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-0243 have an EU (EUVD) identifier?: Yes. CVE-2026-0243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30135.
When was CVE-2026-0243 published?: CVE-2026-0243 was published on 2026-05-13 and last updated on 2026-06-17.

References

https://security.paloaltonetworks.com/CVE-2026-0243

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