PAN-OS: Buffer Overflow Vulnerability via XML Processing
Summary
| CVE | CVE-2026-0310 |
|---|---|
| State | PUBLISHED |
| Assigner | palo_alto |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-10 06:17:04 UTC |
| Updated | 2026-09-10 06:17:04 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v4.0 7.2 HIGH from [email protected]
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:M/U:Red
Problem Types: CWE-787 | CWE-787 CWE-787 Out-of-bounds Write
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 7.2 | HIGH | 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/C... |
| 4.0 | CNA | CVSS | 7.2 | HIGH | 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/A... |
| 4.0 | CNA | CVSS | 6.6 | MEDIUM | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/A... |
| 4.0 | CNA | CVSS | 4.8 | MEDIUM | CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:U/A... |
| 4.0 | CNA | CVSS | 5.2 | MEDIUM | CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:U/A... |
CVSS v4.0 Breakdown
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:M/U:Red
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Palo Alto Networks | Cloud NGFW | affected All custom | AWS, Azure |
| CNA | Palo Alto Networks | PAN-OS | affected 12.2.0 12.2.3 custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 12.1.0 12.1.4-h10 custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 11.2.0 11.2.4-h21 custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 11.1.0 11.1.4-h36 custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 10.2.0 10.2.7-h37 custom | Not specified |
| CNA | Palo Alto Networks | Prisma Access | unaffected 12.1.0 12.1.4-h10 custom | Not specified |
| CNA | Palo Alto Networks | Prisma Access | affected 11.2.0 11.2.4-h21 custom | Not specified |
| CNA | Palo Alto Networks | Prisma Access | affected 10.2.0 10.2.7-h37 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| security.paloaltonetworks.com/CVE-2026-0310 | [email protected] | security.paloaltonetworks.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Palo Alto Networks thanks our internal security research teams for discovering and reporting this issue. (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-09-09T16:00:00.000Z | Initial Publication |
Solutions
CNA: VERSION MINOR VERSION SUGGESTED SOLUTION Cloud 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. PAN-OS 11.2 11.2.11 through 11.2.13-h* Upgrade to 11.2.13-h2 or later. 11.2.8 through 11.2.10-h* Upgrade to 11.2.10-h14 or later. 11.2.5 through 11.2.7-h* Upgrade to 11.2.7-h20 or later. 11.2.0 through 11.2.4-h* Upgrade to 11.2.4-h21 or later. PAN-OS 11.1 11.1.14 through 11.1.16-h* Upgrade to 11.1.16-h2 or later. 11.1.11 through 11.1.13-h* Upgrade to 11.1.13-h12 or later. 11.1.8 through 11.1.10-h* Upgrade to 11.1.10-h33 or later. 11.1.7 through 11.1.7-h* Upgrade to 11.1.7-h10 or later. 11.1.5 through 11.1.6-h* Upgrade to 11.1.6-h38 or later. 11.1.0 through 11.1.4-h* Upgrade to 11.1.4-h36 or later. PAN-OS 10.2 10.2.17 through Upgrade to 10.2.18-h10 or later. 10.2.18-h* 10.2.14 through 10.2.16-h* Upgrade to 10.2.16-h10 or later. 10.2.11 through 10.2.13-h* Upgrade to 10.2.13-h24 or later. 10.2.8 through 10.2.10-h* Upgrade to 10.2.10-h40 or later. 10.2.0 through 10.2.7-h* Upgrade to 10.2.7-h37 or later. All older Upgrade to a supported fixed version. unsupported PAN-OS versions Prisma Access 12.1 12.1.2 through 12.1.* Upgrade to 12.1.7-h5 or later. Prisma Access 11.2 11.2.0 through 11.2* Upgrade to 11.2.7-h20 or later. Prisma Access 10.2 10.2.0 through 10.2.* Upgrade to 10.2.10-h40 or later. * See the note under Product Status for information regarding Prisma Access and Cloud NGFW upgrades.
Workarounds
CNA: No known workarounds exist for this issue.
Exploits
CNA: Palo Alto Networks is not aware of any malicious exploitation of this issue.