Risk Letters

Exploited vulnerability

CVE-2026-0257

TLP:CLEAR

Palo Alto Networks PAN-OS Authentication Bypass Vulnerability

Palo Alto Networks PAN-OS contains an authentication bypass vulnerability that allows attackers to bypass security restrictions and establish an unauthorized VPN connection.

Facts

  • Vendor: Palo Alto Networks
  • Product: PAN-OS
  • CVSS: 7.8
  • EPSS (probability of exploitation within 30 days): 95 %
  • On CISA's Known Exploited Vulnerabilities list since: 29 May 2026
  • First known exploitation: 29 May 2026
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 1 June 2026
  • Weakness: CWE-565
  • First seen by Risk Letters: 29 May 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD