CVE-2026-0269: CWE-754: Improper Check for Unusual or Exceptional Conditions in Palo Alto Networks Cloud NGFW
A memory corruption vulnerability in the processing of tunnel traffic in Palo Alto Networks PAN-OS® software allows an authenticated user to initiate system reboots using a maliciously crafted packet. Repeated attempts to initiate a reboot causes the firewall to enter maintenance mode. Panorama, Cloud NGFW, and Prisma® Access are not impacted by this vulnerability.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-0269) involves improper handling of unusual or exceptional conditions (CWE-754) in Palo Alto Networks PAN-OS software's tunnel traffic processing. It allows an authenticated user to trigger system reboots by sending maliciously crafted packets. Multiple attempts can cause the firewall to enter maintenance mode, potentially disrupting firewall availability. The vulnerability does not impact Panorama, Cloud NGFW, or Prisma Access products. There is no vendor advisory or patch information available at this time.
Potential Impact
An authenticated attacker can cause denial of service by forcing system reboots and ultimately placing the firewall into maintenance mode, which may interrupt network security functions. There is no indication of data confidentiality or integrity compromise. The impact is limited to availability disruption on affected PAN-OS firewall devices.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround has been published. Until a patch is available, limit authenticated user access to trusted personnel and monitor for unusual reboot activity.
CVE-2026-0269: CWE-754: Improper Check for Unusual or Exceptional Conditions in Palo Alto Networks Cloud NGFW
Description
A memory corruption vulnerability in the processing of tunnel traffic in Palo Alto Networks PAN-OS® software allows an authenticated user to initiate system reboots using a maliciously crafted packet. Repeated attempts to initiate a reboot causes the firewall to enter maintenance mode. Panorama, Cloud NGFW, and Prisma® Access are not impacted by this vulnerability.
CVSS v4.0
Score 4.6medium
Affected software
cpe:2.3:o:palo_alto_networks:pan-os:12.1.4:h3:*:*:*:*:*:*cpe:2.3:o:palo_alto_networks:pan-os:12.1.4:h2:*:*:*:*:*:*cpe:2.3:o:palo_alto_networks:pan-os:12.1.4:-:*:*:*:*:*:*cpe:2.3:o:palo_alto_networks:pan-os:12.1.3:*:*:*:*:*:*:*cpe:2.3:o:palo_alto_networks:pan-os:12.1.2:*:*:*:*:*:*:*cpe:2.3:o:palo_alto_networks:pan-os:11.2.9:*:*:*:*:*:*:*Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-0269) involves improper handling of unusual or exceptional conditions (CWE-754) in Palo Alto Networks PAN-OS software's tunnel traffic processing. It allows an authenticated user to trigger system reboots by sending maliciously crafted packets. Multiple attempts can cause the firewall to enter maintenance mode, potentially disrupting firewall availability. The vulnerability does not impact Panorama, Cloud NGFW, or Prisma Access products. There is no vendor advisory or patch information available at this time.
Potential Impact
An authenticated attacker can cause denial of service by forcing system reboots and ultimately placing the firewall into maintenance mode, which may interrupt network security functions. There is no indication of data confidentiality or integrity compromise. The impact is limited to availability disruption on affected PAN-OS firewall devices.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround has been published. Until a patch is available, limit authenticated user access to trusted personnel and monitor for unusual reboot activity.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- palo_alto
- Date Reserved
- 2025-11-03T20:44:29.323Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a29dafc3187570649959415
Added to database: 6/10/2026, 9:45:32 PM
Last enriched: 6/10/2026, 10:01:30 PM
Last updated: 6/11/2026, 9:15:21 AM
Views: 13
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.