CVE-2026-76675 in EdgeConnect SD-WAN Gateways
Summary
by MITRE • 09/15/2026
A command injection vulnerability exists in the command line interface of EdgeConnect SD-WAN Gateways. Successful exploitation could allow an authenticated remote attacker with high privileges to execute arbitrary commands on the underlying operating system leading to complete system compromise.
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Analysis
by VulDB Data Team • 09/15/2026
The identified security flaw represents a critical command injection vulnerability located within the command line interface (CLI) of Palo Alto Networks EdgeConnect SD-WAN gateways. This specific type of weakness, categorized under CWE-78 Improper Neutralization of Special Elements used in an OS Command, occurs when software constructs operating system commands using externally influenced input without sufficiently neutralizing dangerous elements such as special characters or shell metacharacters. In the context of network infrastructure devices like SD-WAN gateways, the CLI serves as a primary administrative interface for configuration and management tasks. When this interface fails to properly sanitize user-supplied data before passing it to underlying system commands, it creates an avenue for attackers to inject malicious command sequences that are executed with the privileges of the application process.
The operational impact of this vulnerability is severe due to the privilege level required for exploitation. The advisory specifies that a successful attack requires an authenticated remote attacker possessing high-level administrative privileges. While this requirement limits the pool of potential threat actors compared to unauthenticated vulnerabilities, it does not mitigate the risk entirely. Insider threats or compromised administrator credentials can easily exploit this flaw. Once exploited, the attacker gains the ability to execute arbitrary commands on the underlying operating system hosting the EdgeConnect software. This capability effectively results in complete system compromise, allowing the adversary to manipulate network configurations, exfiltrate sensitive data, install persistent backdoors, or use the gateway as a pivot point for further lateral movement within the enterprise network.
From a threat intelligence perspective, this vulnerability aligns with MITRE ATT&CK techniques related to Command and Scripting Interpreter abuse, specifically T1059 which covers various scripting languages used by attackers to execute commands on compromised systems. The ability to run arbitrary OS commands places this incident firmly in the execution phase of the cyber kill chain, enabling subsequent stages such as persistence, privilege escalation, and credential access if not immediately contained. The severity is compounded by the critical nature of SD-WAN infrastructure; compromising these gateways can disrupt connectivity between branch offices and data centers, leading to significant business continuity issues alongside security breaches.
Mitigation strategies must focus on both immediate remediation and long-term architectural hardening. Palo Alto Networks has released software updates that address this specific command injection flaw by implementing stricter input validation and output encoding within the CLI processing logic. Administrators should prioritize applying these patches immediately across all EdgeConnect deployments to close the attack vector. In addition to patching, organizations must enforce strict access control policies for high-privilege accounts, ensuring that administrative credentials are protected with multi-factor authentication and monitored via security information and event management systems for anomalous activity. Regular audits of CLI usage logs can help detect any attempted exploitation activities before they result in full system compromise.