CVE-2026-0262Network attack vector

Unauthenticated service interruption via crafted network traffic

Published May 13, 2026 · Updated May 13, 2026

Denial of service in PAN-OS 10.2, 11.1, 11.2, and 12.1 allows remote attackers to interrupt firewalls via crafted dataplane traffic. Affected dataplane parsers fail to handle unusual or exceptional conditions in crafted network traffic, but Palo Alto Networks has not disclosed the protocols, code loci, or exact failure mode. No special configuration or authentication is required; the vendor reports availability impact only, does not specify whether devices crash or hang, and states that Prisma Access is not affected.

CVSS severity7.5
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in PAN-OS 10.2, 11.1, 11.2, and 12.1 allows remote attackers to interrupt firewalls via crafted dataplane traffic. Affected dataplane parsers fail to handle unusual or exceptional conditions in crafted network traffic, but Palo Alto Networks has not disclosed the protocols, code loci, or exact failure mode. No special configuration or authentication is required; the vendor reports availability impact only, does not specify whether devices crash or hang, and states that Prisma Access is not affected.

The record

CVE
CVE-2026-0262
Published
May 13, 2026
Updated
May 13, 2026
Vendor
Palo Alto Networks
Product
PAN-OS
Classifications
CWE-754, CAPEC-153, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=10.2.0 <10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34 changes=[{"at":"10.2.18-h6","status":"unaffected"},{"at":"10.2.16-h7","status":"unaffected"},{"at":"10.2.13-h21","status":"unaffected"},{"at":"10.2.10-h36","status":"unaffected"},{"at":"10.2.7-h34","status":"unaffected"}]
  2. Affected versionversion=11.1.0 <11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33 changes=[{"at":"11.1.15","status":"unaffected"},{"at":"11.1.13-h5","status":"unaffected"},{"at":"11.1.10-h25","status":"unaffected"},{"at":"11.1.7-h6","status":"unaffected"},{"at":"11.1.6-h32","status":"unaffected"},{"at":"11.1.4-h33","status":"unaffected"}]
  3. Affected versionversion=11.2.0 <11.2.12, 11.2.10-h6, 11.2.7-h13, 11.2.4-h17 changes=[{"at":"11.2.12","status":"unaffected"},{"at":"11.2.10-h6","status":"unaffected"},{"at":"11.2.7-h13","status":"unaffected"},{"at":"11.2.4-h17","status":"unaffected"}]
  4. Affected versionversion=12.1.0 <12.1.7, 12.1.4-h5 changes=[{"at":"12.1.7","status":"unaffected"},{"at":"12.1.4-h5","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Palo Alto Networks · PAN-OSversion=10.2.0 <10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34 changes=[{"at":"10.2.18-h6","status":"unaffected"},{"at":"10.2.16-h7","status":"unaffected"},{"at":"10.2.13-h21","status":"unaffected"},{"at":"10.2.10-h36","status":"unaffected"},{"at":"10.2.7-h34","status":"unaffected"}]; version=11.1.0 <11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33 changes=[{"at":"11.1.15","status":"unaffected"},{"at":"11.1.13-h5","status":"unaffected"},{"at":"11.1.10-h25","status":"unaffected"},{"at":"11.1.7-h6","status":"unaffected"},{"at":"11.1.6-h32","status":"unaffected"},{"at":"11.1.4-h33","status":"unaffected"}]; version=11.2.0 <11.2.12, 11.2.10-h6, 11.2.7-h13, 11.2.4-h17 changes=[{"at":"11.2.12","status":"unaffected"},{"at":"11.2.10-h6","status":"unaffected"},{"at":"11.2.7-h13","status":"unaffected"},{"at":"11.2.4-h17","status":"unaffected"}]; version=12.1.0 <12.1.7, 12.1.4-h5 changes=[{"at":"12.1.7","status":"unaffected"},{"at":"12.1.4-h5","status":"unaffected"}]
Palo Alto Networks · Prisma Accessversion=10.2.0 <10.2.10-h36 changes=[{"at":"10.2.10-h36","status":"unaffected"}]; version=11.2.0 <11.2.7-h13 changes=[{"at":"11.2.7-h13","status":"unaffected"}]

Published CVSS scores

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
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
CAPEC-153Input Data Manipulation
T1499.004Application or System Exploitation

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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