CVE-2026-0257
Authentication Bypass in Palo Alto Networks PAN-OS. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 29 May 2026.
- Product
- Palo Alto Networks PAN-OS
- Added to CISA's catalog
- Federal fix-by date
- Ransomware
- Known to be used in ransomware
- Vendor advisories
- Sources
- CISA’s catalog, NVD entry
CISA’s description.
Palo Alto Networks PAN-OS contains an authentication bypass vulnerability that allows attackers to bypass security restrictions and establish an unauthorized VPN connection.
More from Palo Alto Networks this year.
- CVE-2026-0322 Code Injection, added
- CVE-2026-0300 Out-of-bounds Write, added
Every flaw CISA confirmed exploited in the last 30 days is on the exploit watch. This is not security advice. Check the vendor’s advisory before acting. From CISA’s catalog of 4 November 2026.