CVE-2026-0263
CVE-2026-0263 is a high-severity vulnerability with a CVSS 4.0 base score of 7.2. 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-787.
Key facts
- Severity: High (CVSS 4.0 base score 7.2)
- EPSS exploit prediction: 0% (23rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-30064
- Weakness: CWE-787
- Published:
- Last modified:
Description
A buffer overflow vulnerability in the IKEv2 processing of Palo Alto Networks PAN-OS® software allows an unauthenticated network-based attacker to execute arbitrary code with elevated privileges on the firewall, or cause a denial of service (DoS) condition. Panorama, Cloud NGFW, and Prisma® Access are not impacted by these vulnerabilities.
Frequently asked questions
- What is CVE-2026-0263?
- A buffer overflow vulnerability in the IKEv2 processing of Palo Alto Networks PAN-OS® software allows an unauthenticated network-based attacker to execute arbitrary code with elevated privileges on the firewall, or cause a denial of service (DoS) condition. Panorama, Cloud NGFW, and Prisma® Access are not impacted by these vulnerabilities.
- How severe is CVE-2026-0263?
- CVE-2026-0263 has a CVSS 4.0 base score of 7.2, rated high severity.
- Is CVE-2026-0263 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-0263?
- 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-2026-0263 have an EU (EUVD) identifier?
- Yes. CVE-2026-0263 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30064.
- When was CVE-2026-0263 published?
- CVE-2026-0263 was published on 2026-05-13 and last updated on 2026-06-17.
References
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