Vulnerability intelligence
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.
CVSS Score
7.8
High
EPSS — Exploit Probability
94%
Riskier than 100% of all CVEs · checked 2026-09-09
Exploitation
Confirmed in the wild
Used in ransomware campaigns
Remediation
Patch available
Federal deadline 2026-06-01
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Deadline for federal agencies: 2026-06-01.
19 articles across 10 outlets · first covered May 29, 2026 · latest Jul 21, 2026
Associated threat actors
Coverage timeline
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Qilin Ransomware Exploits CVE-2026-0257 in Palo Alto VPNsecurityaffairs.com · Jul 21, 2026
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Qilin ransomware exploits CVE-2026-0257 in Palo Alto firewallsecurityonline.info · Jul 21, 2026
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Attackers Leverage CVE-2026-0257 to Bypass GlobalProtect VPN Authsecurityaffairs.com · Jun 15, 2026
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Attackers Exploit PANOS Flaw to Bypass GlobalProtect VPNunit42.paloaltonetworks.com · Jun 5, 2026
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CVE-2026-0257 flaw lets hackers bypass Palo Alto VPN authwww.darkreading.com · Jun 1, 2026
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CVE-2026-0257 Cache Warmer RCE Bug Hitssecurityonline.info · Jun 1, 2026
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Palo Alto PANOS flaw exploited days after patch releasewww.securityweek.com · Jun 1, 2026
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CISA flags PAN-OS flaw CVE-2026-0257 as attackers bypass VPN authsecurityaffairs.com · Jun 1, 2026
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Attackers Exploit CVE-2026-0257 in Palo Alto GlobalProtect VPNwww.infosecurity-magazine.com · Jun 1, 2026
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Critical FreeBSD Kernel Buffer Overflow Disclosed: Public Details & PoC Outsecurityonline.info · Jun 1, 2026
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Critical Langroid Vulnerability Allows RCE via Prompt Injectionsecurityonline.info · Jun 1, 2026
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CVE-2026-0257 flaw lets attackers hijack Palo Alto VPN loginssecurityaffairs.com · May 31, 2026
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CVE-2026-0257 flaw in MCP Toolbox allows site based session hijacksecurityonline.info · May 31, 2026
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PAN-OS GlobalProtect Authentication Bypass (CVE-2026-0257) Under Active Exploitationthehackernews.com · May 30, 2026
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Critical PANOS Flaw Lets Attackers Bypass Authenticationsecurityonline.info · May 30, 2026
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CISA KEV Catalog flags Palo Alto PAN-OS auth bypass flawwww.cisa.gov · May 29, 2026
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CISA Adds Palo Alto PAN OS Auth Bypass CVE-2026-0257 to KEV Listwww.cisa.gov · May 29, 2026
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CISA Flags Palo Alto PAN OS Auth Bypass After Active Exploitationcisa.gov · May 29, 2026
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Rapid7 flags active CVE-2026-0257 exploits in PAN-OS GlobalProtectwww.rapid7.com · May 29, 2026