PatchTheCVECVE-2026-0257: Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
CVE-2026-0257 is a critical-severity flaw (CVSS 9.1) affecting pan-os, prisma access, ruggedcom ape1808 firmware, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- EPSS top 1%: very likely to be exploited
- Exploited in the wild (CISA KEV)
- Used in ransomware campaigns
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.1 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 95.0% (top 1%) |
| CISA exploited list | Yes, fix due 2026-06-01, used in ransomware |
| Weakness | CWE-565 |
| Published | 2026-05-13 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Exploited Added to the CISA Known Exploited Vulnerabilities list
- Deadline CISA due date for US federal agencies to patch
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- GitHub PoC: sfewer-r7/CVE-2026-0257 (30 stars)
- GitHub PoC: 0xBlackash/CVE-2026-0257 (3 stars)
- GitHub PoC: tushargurav28/CVE-2026-0257 (3 stars)
- Write-up: security.paloaltonetworks.com/CVE-2026-0257
- Nuclei scan template: Palo Alto Networks PAN-OS - Authentication Bypass
Advisories and coverage
Research and news
- Unit 42 (Palo Alto): Active Exploitation of May 2026 PAN-OS CVE-2026-0257 (Updated October 20) 2026-10-20
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-0257?
pan-os: upgrade to 10.2.7; prisma access: mitigate or apply the listed mitigation; ruggedcom ape1808 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2026-0257 being exploited?
Yes. CVE-2026-0257 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.
What does CVE-2026-0257 affect?
CVE-2026-0257 affects pan-os, prisma access, ruggedcom ape1808 firmware. Severity is critical (CVSS 9.1). 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
How urgent is CVE-2026-0257?
Priority 97/100. Critical severity; EPSS top 1%: very likely to be exploited; Exploited in the wild (CISA KEV); Used in ransomware campaigns; Public exploit reference; Remotely exploitable, no login, no user action
Software pages
Palo Alto PAN-OS vulnerabilities · Siemens vulnerabilities
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