ACTIVELY EXPLOITED
CVE-2026-0257: Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
| Vendor | Palo Alto Networks |
|---|---|
| Product | PAN-OS |
| Actively exploited | Yes |
| Added to CISA KEV | 29 May 2026 |
| CISA federal deadline | 1 Jun 2026 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-565 |
Required action (CISA's text)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description (NVD)
Palo Alto Networks PAN-OS contains an authentication bypass vulnerability that allows attackers to bypass security restrictions and establish an unauthorized VPN connection.
SOURCES
Other Palo Alto Networks flaws
- CVE-2026-0322: Palo Alto Networks PAN-OS Code Injection Vulnerability
- CVE-2026-0300: Palo Alto Networks PAN-OS Out-of-bounds Write Vulnerability
- CVE-2025-0111: Palo Alto Networks PAN-OS File Read Vulnerability
- CVE-2025-0108: Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
- CVE-2024-3393: Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.