Yahoo · Sep 12, 2026
Why Palo Alto Networks (PANW) Shares Are Trading Lower Today
Shares of cybersecurity platform provider Palo Alto Networks (NASDAQ:PANW) fell 3% in the afternoon session after the company published a security advisory addressing a critical buffer overflow vulnerability in its PAN-OS software. The security advisory detailed an XML processing flaw in PAN-OS, cataloged as CVE-2026-0310 with a CVSSv4 base score of 9.2. This high-severity vulnerability enables unauthenticated attackers to execute arbitrary code with root privileges or trigger denial-of-service


