How severe is CVE-2026-0263?

CVE-2026-0263 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-0263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-0263?

CVE-2026-0263 primarily affects Paloaltonetworks Pan-os. In total, 94 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

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 critical 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 2026-07-14.

CVE-2026-0263

CVE-2026-0263 is a critical-severity vulnerability in Paloaltonetworks Pan-os with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
CVSS v4: 7.2
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30064
Weakness: CWE-787
Affected product: Paloaltonetworks Pan-os
Published: 2026-05-13
Last modified: 2026-07-14

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 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-0263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-0263?: CVE-2026-0263 primarily affects Paloaltonetworks Pan-os. In total, 94 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
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 critical 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 2026-07-14.

References

https://security.paloaltonetworks.com/CVE-2026-0263

Affected products (94)

cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h10:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h11:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h12:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h13:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h15:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h16:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h17:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h18:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h25:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h27:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h3:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h32:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h5:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h6:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h7:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h8:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h9:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h10:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h14:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h17:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h18:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h19:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h20:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h21:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h22:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h23:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h25:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h29:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h3:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h5:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h6:*:*:*:*:*:*

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