CVE-2026-0257

CRITICAL9.1

CISA KEV

Published 2026-05-13 · Updated 2026-10-26 · Source psirt@paloaltonetworks.com

Summary

CVE-2026-0257 is a critical-severity (CVSS 9.1) vulnerability in Palo Alto Networks PAN-OS. CISA added it to the Known Exploited Vulnerabilities catalog on May 29, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 1, 2026. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Palo Alto Networks has 16 vulnerabilities in the KEV catalog, 6 of them linked to ransomware.

All 16 known-exploited Palo Alto Networks vulnerabilities →

Description

Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS® software allows the attacker to bypass security restrictions and establish an unauthorized VPN connection. Panorama and Cloud NGFW are not impacted by these issues.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CWE-565

CISA Known-Exploited Vulnerability

Product: Palo Alto Networks — PAN-OS

Name: Palo Alto Networks PAN-OS Authentication Bypass Vulnerability

Date added: 2026-05-29 · Due: 2026-06-01

USED IN RANSOMWARE

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

View on NVD

More exploited Palo Alto Networks vulnerabilities

Most recently added to CISA KEV

CVE-2026-0322
PAN-OS — Palo Alto Networks PAN-OS Code Injection Vulnerability
added 2026-10-14
CVE-2026-0300
PAN-OS — Palo Alto Networks PAN-OS Out-of-bounds Write Vulnerability
added 2026-05-06
CVE-2025-0111
PAN-OS — Palo Alto Networks PAN-OS File Read Vulnerability
added 2025-02-20
CVE-2025-0108
PAN-OS — Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
added 2025-02-18
CVE-2024-3393
PAN-OS — Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability
added 2024-12-30
CVE-2024-9474
RANSOMWARE
PAN-OS — Palo Alto Networks PAN-OS Management Interface OS Command Injection Vulnerability
added 2024-11-18

View all →

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