CVE-2026-0280: CWE-131 Incorrect Calculation of Buffer Size in Palo Alto Networks Cloud NGFW
An IPv6 packet processing vulnerability in the dataplane of Palo Alto Networks PAN-OS® software enables an unauthenticated attacker to bypass firewall security policy enforcement, allowing network traffic that should be blocked to reach protected services. Cloud NGFW and Panorama are not impacted by this vulnerability.
AI Analysis
Technical Summary
This vulnerability involves an incorrect calculation of buffer size (CWE-131) in the IPv6 packet processing component of Palo Alto Networks PAN-OS software's dataplane. Exploitation could allow an unauthenticated attacker to bypass firewall security policies, enabling unauthorized network traffic to reach protected services. Cloud NGFW and Panorama are explicitly not impacted. The CVSS 4.0 base score is 1.7, indicating low severity. No known exploits are reported in the wild, and no remediation level or patch information is currently available.
Potential Impact
An attacker could bypass firewall security policies in affected PAN-OS software, allowing network traffic that should be blocked to reach protected services. This could undermine network security controls but is rated low severity due to limited impact and exploitability. Cloud NGFW and Panorama are not affected, limiting the scope of impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or mitigation has been announced. Users should monitor Palo Alto Networks advisories for updates.
CVE-2026-0280: CWE-131 Incorrect Calculation of Buffer Size in Palo Alto Networks Cloud NGFW
Description
An IPv6 packet processing vulnerability in the dataplane of Palo Alto Networks PAN-OS® software enables an unauthenticated attacker to bypass firewall security policy enforcement, allowing network traffic that should be blocked to reach protected services. Cloud NGFW and Panorama are not impacted by this vulnerability.
CVSS v4.0
Score 1.7low
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an incorrect calculation of buffer size (CWE-131) in the IPv6 packet processing component of Palo Alto Networks PAN-OS software's dataplane. Exploitation could allow an unauthenticated attacker to bypass firewall security policies, enabling unauthorized network traffic to reach protected services. Cloud NGFW and Panorama are explicitly not impacted. The CVSS 4.0 base score is 1.7, indicating low severity. No known exploits are reported in the wild, and no remediation level or patch information is currently available.
Potential Impact
An attacker could bypass firewall security policies in affected PAN-OS software, allowing network traffic that should be blocked to reach protected services. This could undermine network security controls but is rated low severity due to limited impact and exploitability. Cloud NGFW and Panorama are not affected, limiting the scope of impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or mitigation has been announced. Users should monitor Palo Alto Networks advisories for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- palo_alto
- Date Reserved
- 2025-11-03T20:44:39.119Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4ff3f668715ace43ecf5b9
Added to database: 07/09/2026, 19:18:14 UTC
Last enriched: 08/11/2026, 13:15:57 UTC
Last updated: 08/22/2026, 10:52:07 UTC
Views: 94
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