CVE-2026-0310 PUBLISHED

PAN-OS: Buffer Overflow Vulnerability via XML Processing

Assigner: palo_alto
Reserved: 03.11.2025 Published: 10.09.2026 Updated: 10.09.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 7.2

The risk is highest for PA-Series hardware firewalls as there is a risk of arbitrary code execution

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	Low
Attack Complexity	High	Integrity	High	Integrity	Low
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

The risk is highest for PA-Series hardware firewalls as there is a risk of arbitrary code execution

CVSS 4.0

CVSS Vector: 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/AU:N/R:U/V:D/RE:M/U:Amber
CVSS Score: 6.6

The risk is lower for VM-Series firewalls, as the impact is limited to a Denial of Service condition

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

The risk is lower for VM-Series firewalls, as the impact is limited to a Denial of Service condition

CVSS 4.0

CVSS Vector: 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/AU:N/R:U/V:D/RE:M/U:Amber
CVSS Score: 4.8

The risk of exploitation is lower for Prisma Access and Cloud NGFW as it requires an authenticated user and the external network access is restricted.

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	High	Confidentiality	Low
Attack Complexity	High	Integrity	High	Integrity	Low
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

The risk of exploitation is lower for Prisma Access and Cloud NGFW as it requires an authenticated user and the external network access is restricted.

CVSS 4.0

CVSS Vector: 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/AU:N/R:U/V:D/RE:M/U:Amber
CVSS Score: 5.2

You can reduce the risk of exploitation by restricting access to a jump box that is the only system allowed to access the management interface.

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	High	Confidentiality	Low
Attack Complexity	High	Integrity	High	Integrity	Low
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

You can reduce the risk of exploitation by restricting access to a jump box that is the only system allowed to access the management interface.

CVSS 4.0

Product Status

Vendor	Palo Alto Networks
Product	Cloud NGFW
Versions	Default: unaffected Version All is affected

Vendor	Palo Alto Networks
Product	PAN-OS
Versions	Default: unaffected affected from 12.2.0 to 12.2.3 (excl.) affected from 12.1.0 to 12.1.4-h10 (excl.) affected from 11.2.0 to 11.2.4-h21 (excl.) affected from 11.1.0 to 11.1.4-h36 (excl.) affected from 10.2.0 to 10.2.7-h37 (excl.)

Vendor	Palo Alto Networks
Product	Prisma Access
Versions	Default: unaffected unaffected from 12.1.0 to 12.1.4-h10 (excl.) affected from 11.2.0 to 11.2.4-h21 (excl.) affected from 10.2.0 to 10.2.7-h37 (excl.)

Exploits

Palo Alto Networks is not aware of any malicious exploitation of this issue.

Credits

Palo Alto Networks thanks our internal security research teams for discovering and reporting this issue. other

References

https://security.paloaltonetworks.com/CVE-2026-0310

Problem Types

CWE-787 Out-of-bounds Write CWE

Impacts

CAPEC-100 Overflow Buffers