CVE-2026-0300 - Vulnerability Analysis

Overview

Palo Alto Networks PAN-OS contains a buffer overflow caused by specially crafted packets in the User-ID™ Authentication Portal service, letting unauthenticated attackers execute arbitrary code with root privileges, exploit requires network access to the portal.

Severity & Score

Impact

Unauthenticated attackers can execute arbitrary code with root privileges, leading to full system compromise.

Mitigation

Restrict access to the User-ID™ Authentication Portal to trusted internal IP addresses and update to the latest PAN-OS version.

References

• https://security.paloaltonetworks.com/CVE-2026-0300
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-0300

Related Resources

• Vulnerability Intelligence Dashboard
• Credential Scanner