CVE-2026-0300

CRITICALCISA KEV

9.8

Description

A buffer overflow vulnerability in the User-ID™ Authentication Portal (aka Captive Portal) service of Palo Alto Networks PAN-OS software allows an unauthenticated attacker to execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls by sending specially crafted packets. The risk of this issue is greatly reduced if you secure access to the User-ID™ Authentication Portal per the best practice guidelines https://knowledgebase.paloaltonetworks.com/KCSArticleDetail by restricting access to only trusted internal IP addresses. Prisma Access, Cloud NGFW and Panorama appliances are not impacted by this vulnerability.

Details CVE

Score CVSS v3.19.8

SeveriteCRITICAL

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie5/6/2026

Derniere modification5/7/2026

Sourcenvd

Observations honeypot0

CISA KEV

FournisseurPalo Alto Networks

ProduitPAN-OS

Nom vulnerabilitePalo Alto Networks PAN-OS Out-of-bounds Write Vulnerability

Date ajout KEV2026-05-06

Date limite remediation2026-05-09

Utilise dans ransomwareUnknown

Produits affectes

paloaltonetworks:pa-1410paloaltonetworks:pa-1420paloaltonetworks:pa-3410paloaltonetworks:pa-3420paloaltonetworks:pa-3430paloaltonetworks:pa-3440paloaltonetworks:pa-410paloaltonetworks:pa-410rpaloaltonetworks:pa-410r-5gpaloaltonetworks:pa-415paloaltonetworks:pa-415-5gpaloaltonetworks:pa-440paloaltonetworks:pa-445paloaltonetworks:pa-450paloaltonetworks:pa-450rpaloaltonetworks:pa-450r-5gpaloaltonetworks:pa-455paloaltonetworks:pa-455-5gpaloaltonetworks:pa-455r-5gpaloaltonetworks:pa-460paloaltonetworks:pa-501paloaltonetworks:pa-505paloaltonetworks:pa-510paloaltonetworks:pa-520paloaltonetworks:pa-540paloaltonetworks:pa-5410paloaltonetworks:pa-5420paloaltonetworks:pa-5430paloaltonetworks:pa-5440paloaltonetworks:pa-5445paloaltonetworks:pa-545-poepaloaltonetworks:pa-5450paloaltonetworks:pa-550paloaltonetworks:pa-5540paloaltonetworks:pa-555-poepaloaltonetworks:pa-5550paloaltonetworks:pa-5560paloaltonetworks:pa-5570paloaltonetworks:pa-5580paloaltonetworks:pa-560paloaltonetworks:pa-7500paloaltonetworks:pa-7500-dpc-apaloaltonetworks:pan-ospaloaltonetworks:vm-100paloaltonetworks:vm-300paloaltonetworks:vm-50paloaltonetworks:vm-500paloaltonetworks:vm-700

Faiblesses (CWE)

CWE-787

References

https://security.paloaltonetworks.com/CVE-2026-0300(psirt@paloaltonetworks.com)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-0300(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlations IOC

Aucune correlation enregistree

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