CVEvulnerability

CVE-2026-0257

7.8 HIGH Known exploited Published 2026-05-13 Modified 2026-10-26 Official page ↗

CISA Known Exploited Vulnerability

Palo Alto Networks PAN-OS Authentication Bypass Vulnerability — Palo Alto Networks PAN-OS

Palo Alto Networks PAN-OS contains an authentication bypass vulnerability that allows attackers to bypass security restrictions and establish an unauthorized VPN connection.

Added to KEV: 2026-05-29
Remediation due: 2026-06-01
Ransomware use: Known
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.
Notes: https://security.paloaltonetworks.com/CVE-2026-0257 ; https://nvd.nist.gov/vuln/detail/CVE-2026-0257

Status: Analyzed
Published: 2026-05-13
Last modified: 2026-10-26
Assigner: [email protected]
CVSS 4.0 ([email protected]): 7.8 HIGH — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:D/RE:M/U:Red
CVSS 3.1 ([email protected]): 9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses: CWE-565

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.

Affected configurations

• paloaltonetworks pan-os (< 10.2.7) • paloaltonetworks pan-os 10.2.7 • paloaltonetworks pan-os 10.2.8 • paloaltonetworks pan-os 10.2.9 • paloaltonetworks pan-os 10.2.10 • paloaltonetworks pan-os 10.2.11 • paloaltonetworks pan-os 10.2.12 • paloaltonetworks pan-os 10.2.13 • paloaltonetworks pan-os 10.2.14 • paloaltonetworks pan-os 10.2.15 • paloaltonetworks pan-os 10.2.16 • paloaltonetworks pan-os 10.2.17 • paloaltonetworks pan-os 10.2.18 • paloaltonetworks pan-os 11.1.0 • paloaltonetworks pan-os 11.1.1 • paloaltonetworks pan-os 11.1.2 • paloaltonetworks pan-os 11.1.3 • paloaltonetworks pan-os 11.1.4 • paloaltonetworks pan-os 11.1.5 • paloaltonetworks pan-os 11.1.6 • paloaltonetworks pan-os 11.1.7 • paloaltonetworks pan-os 11.1.8 • paloaltonetworks pan-os 11.1.9 • paloaltonetworks pan-os 11.1.10 • paloaltonetworks pan-os 11.1.11 • paloaltonetworks pan-os 11.1.12 • paloaltonetworks pan-os 11.1.13 • paloaltonetworks pan-os 11.1.14 • paloaltonetworks pan-os 11.2.0 • paloaltonetworks pan-os 11.2.1 • paloaltonetworks pan-os 11.2.2 • paloaltonetworks pan-os 11.2.3 • paloaltonetworks pan-os 11.2.4 • paloaltonetworks pan-os 11.2.5 • paloaltonetworks pan-os 11.2.6 • paloaltonetworks pan-os 11.2.7 • paloaltonetworks pan-os 11.2.8 • paloaltonetworks pan-os 11.2.9 • paloaltonetworks pan-os 11.2.10 • paloaltonetworks pan-os 11.2.11 • paloaltonetworks pan-os 12.1.2 • paloaltonetworks pan-os 12.1.3 • paloaltonetworks pan-os 12.1.4 • paloaltonetworks pan-os 12.1.5 • paloaltonetworks pan-os 12.1.6 • paloaltonetworks prisma access • siemens ruggedcom ape1808 firmware

Weakness · CWE (1)

CWE-565 Reliance on Cookies without Validation and Integrity Checking weakness

References