Palo Alto Networks PAN-OS Out-of-bounds Write Vulnerability
High Listed in CISA KEV
Summary
Palo Alto Networks PAN-OS contains an out-of-bounds write vulnerability in the User-ID Authentication Portal (aka Captive Portal) service that can allow an unauthenticated attacker to execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls by sending specially crafted packets.
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Affected products
- Palo Alto Networks:PAN-OS
Sources
- CISA KEV DATABASE
Original Links
- https://nvd.nist.gov/vuln/detail/CVE-2026-0300 advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog kev
- https://security.paloaltonetworks.com/CVE-2026-0300 reference
Timeline
- kev_added CISA KEV
- kev_ingest CISA KEV