CVE-2026-0310Network attack vector

Root code execution via XML buffer overflow

Published Sep 10, 2026 · Updated Sep 10, 2026

Buffer overflow in Palo Alto Networks PAN-OS XML processing allows remote attackers to crash VM-Series or execute root code on PA-Series. Palo Alto Networks identifies an out-of-bounds write during XML processing but has not disclosed the parser, malformed field, or failed bounds check. Network access to a management web or dataplane interface is required; Cloud NGFW and Prisma Access additionally require authentication.

CVSS severity9.2
Critical
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Palo Alto Networks PAN-OS XML processing allows remote attackers to crash VM-Series or execute root code on PA-Series. Palo Alto Networks identifies an out-of-bounds write during XML processing but has not disclosed the parser, malformed field, or failed bounds check. Network access to a management web or dataplane interface is required; Cloud NGFW and Prisma Access additionally require authentication.

The record

CVE
CVE-2026-0310
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
Palo Alto Networks
Product
PAN-OS
Classifications
CWE-787, CAPEC-100, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.2.0 <10.2.7-h37 changes=[{"at":"10.2.18-h10","status":"unaffected"},{"at":"10.2.16-h10","status":"unaffected"},{"at":"10.2.13-h24","status":"unaffected"},{"at":"10.2.10-h40","status":"unaffected"},{"at":"10.2.7-h37","status":"unaffected"}]
  2. Affected versionversion=11.1.0 <11.1.4-h36 changes=[{"at":"11.1.16-h2","status":"unaffected"},{"at":"11.1.13-h12","status":"unaffected"},{"at":"11.1.10-h33","status":"unaffected"},{"at":"11.1.7-h10","status":"unaffected"},{"at":"11.1.6-h38","status":"unaffected"},{"at":"11.1.4-h36","status":"unaffected"}]
  3. Affected versionversion=11.2.0 <11.2.4-h21 changes=[{"at":"11.2.13-h2","status":"unaffected"},{"at":"11.2.10-h14","status":"unaffected"},{"at":"11.2.7-h20","status":"unaffected"},{"at":"11.2.4-h21","status":"unaffected"}]
  4. Affected versionversion=12.1.0 <12.1.4-h10 changes=[{"at":"12.1.10","status":"unaffected"},{"at":"12.1.7-h5","status":"unaffected"},{"at":"12.1.4-h10","status":"unaffected"}]
  5. Affected versionversion=12.2.0 <12.2.3 changes=[{"at":"12.2.3","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Palo Alto Networks · PAN-OSversion=10.2.0 <10.2.7-h37 changes=[{"at":"10.2.18-h10","status":"unaffected"},{"at":"10.2.16-h10","status":"unaffected"},{"at":"10.2.13-h24","status":"unaffected"},{"at":"10.2.10-h40","status":"unaffected"},{"at":"10.2.7-h37","status":"unaffected"}]; version=11.1.0 <11.1.4-h36 changes=[{"at":"11.1.16-h2","status":"unaffected"},{"at":"11.1.13-h12","status":"unaffected"},{"at":"11.1.10-h33","status":"unaffected"},{"at":"11.1.7-h10","status":"unaffected"},{"at":"11.1.6-h38","status":"unaffected"},{"at":"11.1.4-h36","status":"unaffected"}]; version=11.2.0 <11.2.4-h21 changes=[{"at":"11.2.13-h2","status":"unaffected"},{"at":"11.2.10-h14","status":"unaffected"},{"at":"11.2.7-h20","status":"unaffected"},{"at":"11.2.4-h21","status":"unaffected"}]; version=12.1.0 <12.1.4-h10 changes=[{"at":"12.1.10","status":"unaffected"},{"at":"12.1.7-h5","status":"unaffected"},{"at":"12.1.4-h10","status":"unaffected"}]; version=12.2.0 <12.2.3 changes=[{"at":"12.2.3","status":"unaffected"}]
Palo Alto Networks · Cloud NGFWversion=All
Palo Alto Networks · Prisma Accessversion=10.2.0 <10.2.7-h37 changes=[{"at":"10.2.10-h40","status":"unaffected"}]; version=11.2.0 <11.2.4-h21 changes=[{"at":"11.2.7-h20","status":"unaffected"}]

Published CVSS scores

7.7Palo Alto NetworksCVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N
8.7Palo Alto NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
9.2Palo Alto NetworksCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N
7.5Palo Alto NetworksCVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CAPEC-100Overflow Buffers
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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