CVE-2026-0257
Actively exploited. CVE-2026-0257 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-05-29) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2026-0257 is indexed in GitHub PoC and Nuclei. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
Palo Alto Networks PAN-OS contains an authentication bypass vulnerability that allows attackers to bypass security restrictions and establish an unauthorized VPN connection.
CSIRTS triage
- What
- The vulnerability allows attackers to bypass security restrictions and establish unauthorized VPN connections.
- Who is affected
- Users of Palo Alto Networks PAN-OS who have the affected functionality enabled.
- Urgency
- Immediate action is required as the vulnerability is actively exploited and poses a critical risk.
- Action
- Update to the latest version of PAN-OS to resolve the issue.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99.8% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2026-0257 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
- NucleiA nuclei-templates detection/PoC template exists for this CVE.look it up ↗
Advisory coverage (2)
- highexploitedCVE-2026-0257 PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities (Severity: HIGH)paloalto · 2026-06-03
- criticalexploitedCVE-2026-0257: Palo Alto Networks PAN-OS Authentication Bypass Vulnerabilitycisa-kev · 2026-05-29
External references
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[](https://www.csirts.com/cve/CVE-2026-0257)