Home/CVE/Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
CVE

CVE-2026-0257

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.

⚠ CISA KEV EPSS 0.36344
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  • Listed on CISA KEV (known exploited in the wild)
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 3% of all CVEs by exploitation likelihood
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

⬡

Weakness Classification

CWE-565Reliance on Cookies without Validation and Integrity Checking
▣

Scoring & Timeline

Published to NVD13 May 2026 · 07:17 PM
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://security.paloaltonetworks.com/CVE-2026-0257
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