CVE-2026-0286: 
PAN-OS 脆弱性の分析と軽減

CVE-2026-0286 is an authenticated command injection vulnerability in the management plane CLI of Palo Alto Networks PAN-OS software that enables an authenticated administrator to execute arbitrary OS commands as root. It was disclosed on July 8, 2026, and affects PAN-OS on PA-Series and VM-Series firewalls and Panorama (virtual and M-Series appliances) across versions 10.2.x (before 10.2.18-h8), 11.1.x (before 11.1.16), 11.2.x (before 11.2.13), and 12.1.x (before 12.1.8). Cloud NGFW and Prisma Access are not affected. The vulnerability carries a CVSS v3.1 base score of 7.2 (High) and a CVSS v4.0 base score of 6.0 (Medium) (PAN Advisory, GitHub Advisory).

The vulnerability is classified as CWE-78 (Improper Neutralization of Special Elements used in an OS Command), meaning the PAN-OS management plane CLI fails to properly sanitize user-supplied input before passing it to underlying OS command execution routines. An authenticated administrator with CLI access can inject OS command delimiters or special characters into CLI inputs, causing the management plane to execute arbitrary commands with root privileges. No special configuration beyond standard CLI access is required for exposure, though the attack surface is significantly reduced when CLI access is restricted to a limited set of trusted administrators. The vulnerability was discovered externally and reported to Palo Alto Networks (PAN Advisory).

Successful exploitation allows an authenticated administrator to execute arbitrary OS commands as root on the affected PAN-OS management plane, resulting in full confidentiality and integrity compromise of the vulnerable system. An attacker with existing administrative CLI access could read sensitive configuration data (including credentials, certificates, and routing information), modify system files, install backdoors, or pivot to other network segments managed by the firewall or Panorama. Availability impact is rated as none in the CVSS v4.0 scoring, though root-level command execution could still be leveraged to disrupt services (PAN Advisory, GitHub Advisory).

As of the advisory publication date, Palo Alto Networks is not aware of any malicious exploitation of this issue in the wild, and no public proof-of-concept exploit code has been reported (PAN Advisory). The CVSS v4.0 exploit maturity is rated "Unreported," and the EPSS score is approximately 1.4%, placing it in the 69th percentile for exploitation probability within 30 days. Exploitation requires high privileges (authenticated administrator access), which limits the attack surface compared to unauthenticated vulnerabilities. The vulnerability is not listed in the CISA KEV catalog based on available information (GitHub Advisory).

1. Gain Administrative Access: Obtain valid PAN-OS administrator credentials with CLI access, either through credential theft, phishing, reuse of compromised credentials, or insider access.
2. Access the CLI: Connect to the PAN-OS management plane CLI via SSH or the web-based terminal using the compromised administrator account.
3. Identify Injection Points: Enumerate CLI commands or parameters in the management plane that accept user-supplied input and pass it to underlying OS functions without adequate sanitization.
4. Craft Injection Payload: Construct a CLI input containing OS command injection characters (e.g., semicolons, backticks, $() subshells) appended to a legitimate command parameter to break out of the intended command context.
5. Execute Arbitrary Commands as Root: Submit the crafted input; the management plane executes the injected OS commands with root privileges, enabling actions such as reading /etc/shadow, writing SSH keys, or establishing a reverse shell (PAN Advisory).

• Logs: Unusual or unexpected OS-level commands appearing in PAN-OS system logs or audit logs attributed to an administrator account; CLI session logs showing anomalous command sequences with shell metacharacters (;, |, `, $().
• Process: Unexpected child processes spawned from PAN-OS management plane processes (e.g., /bin/sh, bash, curl, wget, python) visible in process listings.
• File System: New or modified files in sensitive directories (e.g., /etc/, /root/, /home/) not associated with normal PAN-OS operations; presence of unauthorized SSH authorized_keys entries for the root account.
• Network: Unexpected outbound network connections from the management interface to external IP addresses, particularly on non-standard ports, which may indicate reverse shell or data exfiltration activity.

Palo Alto Networks has released fixed versions for all affected branches. Administrators should upgrade to the following minimum versions: PAN-OS 10.2.7-h36, 10.2.10-h39, 10.2.13-h23, 10.2.16-h9, or 10.2.18-h8; PAN-OS 11.1.4-h35, 11.1.6-h35, 11.1.7-h8, 11.1.10-h30, 11.1.13-h9, or 11.1.16; PAN-OS 11.2.4-h20, 11.2.7-h18, 11.2.10-h11, or 11.2.13; PAN-OS 12.1.4-h8, 12.1.7-h2, or 12.1.8. As an interim workaround, customers with a Threat Prevention subscription can enable Threat ID 510036 (from content version 9122-10145 or later), which requires routing management traffic through a DP port with SSL decryption enabled. Most critically, restricting CLI access to a minimal set of trusted administrators significantly reduces the risk posed by this vulnerability (PAN Advisory).

The vulnerability generated moderate community discussion on Reddit across multiple subreddits (r/paloaltonetworks, r/sysadmin, r/cybersecurity, r/CVEWatch) shortly after disclosure, with posts framed as public service announcements for PAN-OS administrators. Security aggregators including HKCERT, CERT GARR, and Tenable's plugin pipeline also published coverage. The overall community sentiment reflects awareness without significant alarm, consistent with the authenticated-only exploitation requirement and absence of known in-the-wild exploitation (PAN Advisory).