CVE detail

CVE-2026-0300 — Palo Alto Networks PAN-OS Out-of-bounds Write Vulnerability

Published 2026-05-06 · Modified 2026-05-06 · Source kev

HIGH

severity

CVSS-derived band

n/a

CVSS v3

0–10 scale

0.3207

EPSS probability

exploitation probability, 30d

98.0%

EPSS percentile

percentile vs all CVEs

LISTED

CISA KEV

due 2026-05-09

Description

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.

Remediation

No vendor-published fix data in our corpus for this CVE. Check the references below or the vendor's PSIRT / security advisories page.

References

cvedb.io · NVD · CISA KEV · FIRST EPSS · vendor advisories (CVE Program List v5). Informational only, no warranty — verify every remediation against the vendor advisory before acting on it. This product uses data from the NVD API but is not endorsed or certified by the NVD, CISA, FIRST.org or any vendor named. CVE® is a registered trademark of The MITRE Corporation.