Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
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.
What happened
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.
CISA lists it as exploited, added 29 May 2026.
Does it affect you
Names Palo Alto Networks PAN-OS. Enter the product and version you run to place it against the affected range the vendor published.
What to do
- Follow the vendor advisory for the fixed release and any interim mitigation.
security.paloaltonetworks.com - Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
cisa.gov
CISA’s notes for this entry:
Affected, as published to NVD
- panos
- Palo Alto Networks PAN-OS: everything below 10.2.7
The record
- NVD status
- Analyzed
- Published
- 13 May 2026, last modified 17 Jun 2026 (NVD)
- Severity
- CVSS 3.1 base score 9.1, Critical — computed here from the vector; NVD states 9.1.
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weakness
- CWE-565 (NVD; names by MITRE)
- Exploitation
- Listed in CISA’s Known Exploited Vulnerabilities catalogue since 29 May 2026; federal remediation due 01 Jun 2026. CISA records known use in ransomware campaigns. CISA entry
- Exploit probability
- EPSS 96.9%, 100th percentile — FIRST, scored 23 Oct 2026. FIRST EPSS
- Vendor
- Palo Alto Networks · PAN-OS (CISA)
References on the NVD record
- security.paloaltonetworks.com/CVE-2026-0257Vendor Advisory
- cert-portal.siemens.com/productcert/html/ssa-967325.htmlThird Party Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-0257US Government Resource
Reporting that names this identifier
- Ransomware gangs have been exploiting Palo Alto GlobalProtect VPN flaw since June — Help Net Security, 4 d ago
- Qilin and INC Ransomware Groups Exploit Palo Alto Networks Flaw to Bypass MFA — The Hacker News, 4 d ago
- Qilin Ransomware Attackers Exploit PAN-OS Authentication Bypass for Initial Access — The Hacker News, 3 mo ago
- Palo Alto Warns of Active Exploitation of PAN-OS GlobalProtect VPN Flaw — The Hacker News, 4 mo ago
Sources
The verdict above is computed from the products and versions you entered and the affected ranges the vendor published to NVD. It does not inspect your environment, and this site never reports a product as unaffected: why.