// vulnerability record
cached · NVD via COSMOS syncCVE-2026-0300
CRITICALKEVpublished 2026-05-06 19:16 UTC · 3 months ago · modified 2026-06-17 10:10 UTC
// 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.
// required action (CISA KEV)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Until the vendor releases an official fix, the following workaround should be implemented: - Restrict User-ID Authentication Portal access to only trusted zones. - Disable User-ID Authentication Portal if not required. 5/13/2026: Palo Alto has released a variety of patches. If these are relevant to your environment, please apply the designated patch.
added 2026-05-06 00:00 UTC
// weaknesses (CWE)
- CWE-787