Palo Alto Networks PAN-OS Out-of-bounds Write Vulnerability

When

2026-05-06 00:00 UTC · day precision

Where

Global (internet)

Category

cyber_exploit

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.

Sources

• CISA ↗ · first seen 2026-05-06 00:00 UTC

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