Critical9.2Vendor: HighPalo Alto Networks Updated

Critical [CVE-2026-0310] PAN-OS: Buffer Overflow Vulnerability via XML Processing

This critical-severity Palo Alto Networks advisory covers CVE-2026-0310 affecting Cloud NGFW, PAN-OS, Prisma Access.

CVE-2026-0310 Published Sep 9, 2026

CVE-2026-0310

Affected products & platforms

Palo Alto NetworksPAN-OSFirewallPrisma AccessCloud NGFWPAN-OS / Panorama

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Summary

CVE-2026-0310 PAN-OS: Buffer Overflow Vulnerability via XML Processing

Affected products named by the advisory: Cloud NGFW; Prisma Access.

Affected versions

Cloud NGFW All
PAN-OS < 12.2.3
PAN-OS < 12.1.4-h10
PAN-OS < 11.2.4-h21
PAN-OS < 11.1.4-h36
PAN-OS < 10.2.7-h37

Official advisory · high-confidence parse· fetched 3 hours ago·verify at source

Fixed versions

PAN-OS >= 12.2.3
PAN-OS >= 12.1.10
PAN-OS >= 12.1.7-h5
PAN-OS >= 12.1.4-h10
PAN-OS >= 11.2.13-h2
PAN-OS >= 11.2.10-h14
PAN-OS >= 11.2.7-h20
PAN-OS >= 11.2.4-h21
PAN-OS >= 11.1.16-h2
PAN-OS >= 11.1.13-h12
PAN-OS >= 11.1.10-h33
PAN-OS >= 11.1.7-h10
PAN-OS >= 11.1.6-h38
PAN-OS >= 11.1.4-h36
PAN-OS >= 10.2.18-h10
PAN-OS >= 10.2.16-h10
PAN-OS >= 10.2.13-h24
PAN-OS >= 10.2.10-h40
PAN-OS >= 10.2.7-h37
Prisma Access >= 12.1.7-h5

Official advisory · high-confidence parse· fetched 3 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation

VersionMinor VersionSuggested SolutionCloud NGFW Customers who prefer to upgrade can work with Palo Alto Networks support to schedule an on-demand software upgrade.
PAN-OS 12.2 12.2.0 through 12.2.2 Upgrade to 12.2.3 or later.
PAN-OS 12.1 12.1.8 through 12.1.9 Upgrade to 12.1.10 or later. 12.1.5 through 12.1.7-h* Upgrade to 12.1.7-h5 or 12.1.10 or later. 12.1.2 through 12.1.4-h* Upgrade to 12.1.4-h10 or 12.1.10 or later.

Workaround status

No known workarounds exist for this issue.

Official advisory · high-confidence parse· fetched 3 hours ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Palo Alto Networks Security Advisoriesofficial
Official vendor source used to discover this advisory; it remains the authority for affected products and remediation. Discovered from the machine-readable feed https://security.paloaltonetworks.com/rss.xml; this link opens the Palo Alto Networks advisory index instead of the raw feed document.
Palo Alto Networks
Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Palo Alto Networks

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-0310NVD CVE.org MITRE

Official resources

PAN-OS / Panorama upgrade guide (target: 12.2.3 / 12.1.10 / 12.1.7-h5)
Official documentation
This advisory names 12.2.3 / 12.1.10 / 12.1.7-h5 as the first fixed releases — official upgrade documentation for PAN-OS firewalls and Panorama.
Prisma Access / Prisma documentation
Official documentation
Official Prisma product documentation for the affected component.
Palo Alto Networks Security Advisories portal
Official documentation
Canonical advisory portal — check here for the latest revision of this advisory and affected-version updates.

Discussion(0)

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