CVE-2026-0257: Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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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Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-0257
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2026-0257Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 100% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-0257 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
Recent advisories for Palo Alto Networks
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- high[NEW] [high] Palo Alto Networks PAN-OS: Multiple vulnerabilitiescert-bund · 2026-07-10
- medium[NEW] [medium] Palo Alto Networks Cortex XDR Broker VM: Vulnerability allows privilege escalationcert-bund · 2026-07-10
- unknownCVE-2026-0276: A privilege escalation vulnerability in Palo Alto Networks Cortex® XDR Broker VM enables a loca…nvd · 2026-07-09
- unknownCVE-2026-0275: A local privilege escalation vulnerability in Palo Alto Networks Prisma® Browser allows a local…nvd · 2026-07-09
- unknownCVE-2026-0287: Multiple denial of service vulnerabilities in Palo Alto Networks PAN-OS® software allow an unau…nvd · 2026-07-09
- unknownCVE-2026-0286: A command injection vulnerability in the management plane of Palo Alto Networks PAN-OS® softwar…nvd · 2026-07-09
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