CVE-2026-0257
Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
CVSS
—
No CVSS
EPSS
96.9%
p100
KEV
YES
May 29, 2026
Exploit Today
80
0-100
Published: — · Last modified: —
Product
Palo Alto Networks / PAN-OS
Vulnerability
Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
Added to KEV
May 29, 2026
Remediate by
Jun 1, 2026
Known ransomware use
Yes
Summary description
Palo Alto Networks PAN-OS contains an authentication bypass vulnerability that allows attackers to bypass security restrictions and establish an unauthorized VPN connection.
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