CVE-2026-1324 identifies a critical OS command injection vulnerability in the Sangfor Operation and Maintenance Management System (OMMS) up to version 3.0.12. The vulnerability resides in the SessionController function of the SSH Protocol Handler component, specifically in the file /isomp-protocol/protocol/session. Attackers can manipulate the 'keypassword' parameter to inject arbitrary operating system commands, which the system executes with the privileges of the running service. This flaw allows remote attackers to execute commands without authentication or user interaction, making it highly exploitable over the network. The vulnerability has a CVSS 4.0 base score of 8.7, reflecting its high severity due to network attack vector, low complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. The exploit code is publicly available, increasing the risk of exploitation. The vendor Sangfor has not issued any patches or responses despite early disclosure attempts, leaving affected systems exposed. The vulnerability affects all versions from 3.0.0 through 3.0.12, indicating a wide range of potentially vulnerable deployments. This vulnerability could be leveraged to gain unauthorized control over affected systems, enabling data theft, service disruption, or further network penetration.

The impact of CVE-2026-1324 is severe for organizations using Sangfor OMMS, as successful exploitation allows remote attackers to execute arbitrary OS commands with the privileges of the vulnerable service. This can lead to complete system compromise, including unauthorized access to sensitive data, modification or deletion of critical files, disruption of service availability, and potential lateral movement within the network. Given the nature of the affected product—an operation and maintenance management system—compromise could disrupt IT infrastructure management, leading to operational downtime and increased risk of further attacks. The public availability of exploit code and lack of vendor patching heighten the risk of widespread exploitation. Organizations in sectors relying heavily on Sangfor products, such as telecommunications, government, finance, and large enterprises, face significant operational and reputational risks if this vulnerability is exploited.

1. Immediate network-level mitigation: Restrict access to the Sangfor OMMS management interfaces to trusted IP addresses using firewalls or network segmentation to reduce exposure. 2. Deploy Web Application Firewalls (WAFs) or Intrusion Prevention Systems (IPS) with custom rules to detect and block suspicious payloads targeting the 'keypassword' parameter. 3. Monitor logs for unusual command execution patterns or unexpected SSH protocol handler activity indicative of exploitation attempts. 4. If possible, disable or isolate the vulnerable SSH Protocol Handler component until a vendor patch is available. 5. Conduct thorough vulnerability scanning and penetration testing to identify affected systems within the environment. 6. Engage with Sangfor support channels for updates or unofficial workarounds, and subscribe to threat intelligence feeds for emerging exploit information. 7. Implement strict privilege separation and run OMMS services with the least privileges necessary to limit the impact of potential exploitation. 8. Prepare incident response plans specifically addressing OS command injection scenarios to enable rapid containment and remediation. 9. Consider deploying application-layer sandboxing or containerization to limit the scope of command execution if feasible.