# CVE-2026-0257: Palo Alto Networks PAN-OS Authentication Bypass Vulnerability

- Exploited (CISA KEV): yes, added 2026-05-29, known ransomware use
- Published: 2026-05-13
- CVSS: 7.8 HIGH (v4.0)
- EPSS: 95.6% (100th percentile)
- CWE: CWE-565

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.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | No public claim | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | No public claim | — | — |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

## Social

1 posts seen since 2026-11-02.

- bluesky 2026-11-02: Unit 42 reports ransomware exploitation of PAN-OS CVE-2026-0257 by Qilin and Inc.  Exploited devices and overprivileged AI agents are separate risks that can compound. Prioritize exposed devices; enforce task-scoped agent permissions and action limits outside the model.  Read mo… (https://bsky.app/profile/kimbodo.bsky.social/post/3mzeb64ukrk25)

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2026-0257 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2026-0257