# CVE-2026-0310 — Palo Alto Networks Cloud NGFW

> As of 2026-09-10, CVE-2026-0310 is a High-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in Palo Alto Networks Cloud NGFW, CVSS v4.0 7.2, EPSS 0.3% (26.7th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-0310, most recently “CVE-2026-0310: PAN-OS XML Processing Out-of-Bounds Write Enables Unauthenticated Root RCE”.

**Last updated:** 2026-09-10

## What is CVE-2026-0310?

A buffer overflow vulnerability in the XML processing functionality of Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to the management web or dataplane interface to cause a denial of service (DoS) condition on VM-Series firewalls or execute arbitrary code with root privileges on the PA-Series firewalls. The security risk posed by this issue is minimized when the management interface is restricted to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . Panorama is impacted by this vulnerability.

The record classifies CVE-2026-0310 under weakness class [CWE-787](https://cwe.mitre.org/data/definitions/787.html). 3 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 2 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 7.2 — High (derived from score) (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Red`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 26.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-10

## Is CVE-2026-0310 being exploited?

No public exploitation evidence for CVE-2026-0310 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-09-10. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- **Palo Alto Networks**: Cloud NGFW, PAN-OS, Prisma Access

## How to fix CVE-2026-0310

No vendor patch reference has been recorded for CVE-2026-0310 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-0310

1 tracked threat in the Threadlinqs corpus references CVE-2026-0310, either in the campaign’s CVE list or as an indicator on the campaign record.

- [CVE-2026-0310: PAN-OS XML Processing Out-of-Bounds Write Enables Unauthenticated Root RCE](https://intel.threadlinqs.com/threat/TL-2026-2440) — CRITICAL · 2026-09-10

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-09-10. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [security.paloaltonetworks.com — vendor advisory](https://security.paloaltonetworks.com/CVE-2026-0310)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-0310
Full detection coverage and IOCs for threats exploiting CVE-2026-0310 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp