NVD Vulnerability Detail
Search Exploit, PoC
CVE-2026-0300
Summary

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.

Publication Date May 7, 2026, 4:16 a.m.
Registration Date May 8, 2026, 4:08 a.m.
Last Update May 8, 2026, 2:46 a.m.
CVSS3.1 : CRITICAL
スコア 9.8
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
攻撃元区分(AV) ネットワーク
攻撃条件の複雑さ(AC) 低
攻撃に必要な特権レベル(PR) 不要
利用者の関与(UI) 不要
影響の想定範囲(S) 変更なし
機密性への影響(C) 高
完全性への影響(I) 高
可用性への影響(A) 高
Affected software configurations
Configuration1 or higher or less more than less than
cpe:2.3:o:paloaltonetworks:pan-os:10.2.0:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.1:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.2:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.3:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.4:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.5:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.6:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h12:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h16:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h19:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h21:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h24:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h3:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h32:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h6:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h8:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.8:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.9:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h10:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h12:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h14:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h17:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h18:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h21:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h27:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h3:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h30:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h31:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h5:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h7:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h9:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.11:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.12:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h10:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h16:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h18:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h3:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h5:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h7:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.14:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.15:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.16:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.16:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.16:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.16:h6:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.17:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.18:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.18:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.18:h5:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.0:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.1:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.2:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.3:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h13:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h15:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h16:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h17:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h18:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h25:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h27:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h32:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h7:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h9:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.5:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h10:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h14:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h17:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h19:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h20:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h21:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h22:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h23:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h25:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h29:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h3:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h5:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h6:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h7:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.7:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.7:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.7:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.7:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.8:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.9:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.10:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.10:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.10:h10:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.10:h12:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.10:h21:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.10:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.10:h5:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.10:h7:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.10:h9:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.11:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.12:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.13:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.13:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.13:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.13:h3:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.1.14:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.0:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.1:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.2:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.3:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h10:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h11:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h12:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h14:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h15:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h5:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h6:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h7:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h8:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.4:h9:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.5:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.6:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.7:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.7:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.7:h10:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.7:h11:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.7:h12:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.7:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.7:h3:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.7:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.7:h7:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.7:h8:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.8:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.9:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.10:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.10:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.10:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.10:h3:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.10:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.10:h5:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:11.2.11:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:12.1.2:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:12.1.3:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:12.1.4:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:12.1.4:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:12.1.4:h3:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:12.1.5:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:12.1.6:-:*:*:*:*:*:*
Configuration2 or higher or less more than less than
Related information, measures and tools
Common Vulnerabilities List