CVE-2026-3066 is a medium-severity command injection vulnerability affecting HummerRisk versions 1.0 through 1.5.0. The vulnerability resides in the fixedCommand function of the file hummer-common/hummer-common-core/src/main/java/com/hummer/common/core/utils/PlatformUtils.java, part of the Cloud Compliance Scanning component. An attacker can remotely manipulate inputs to this function to inject and execute arbitrary system commands on the host running HummerRisk. The vulnerability requires no user interaction and no authentication, increasing its risk profile. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and low impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). Although the impact is limited, successful exploitation can lead to unauthorized command execution, potentially allowing attackers to escalate privileges, exfiltrate data, or disrupt operations. The vendor was contacted early but has not responded or issued a patch, and while exploits have been published, no active exploitation has been confirmed. This vulnerability affects organizations relying on HummerRisk for cloud compliance scanning, especially those using versions prior to 1.5.1 or later if patched. The lack of vendor response and patch availability increases the urgency for organizations to implement mitigations or consider alternative solutions.

The primary impact of CVE-2026-3066 is unauthorized remote command execution on systems running vulnerable versions of HummerRisk. This can compromise system integrity by allowing attackers to execute arbitrary commands, potentially leading to privilege escalation, data exfiltration, or disruption of cloud compliance scanning operations. Confidentiality may be affected if sensitive compliance data or system information is accessed or leaked. Availability impact is low but possible if attackers disrupt scanning processes or system stability. Since no authentication or user interaction is required, the attack surface is broad, increasing risk for exposed systems. Organizations relying on HummerRisk for compliance auditing may face regulatory and operational risks if the vulnerability is exploited. The absence of vendor patches and active exploit code availability further heighten potential impact, especially in environments where HummerRisk is internet-facing or integrated with critical cloud infrastructure.

1. Immediately restrict network access to HummerRisk instances, limiting exposure to trusted internal networks only. 2. Implement strict input validation and sanitization on any user-controllable inputs that interact with the fixedCommand function or related components, if source code modification is possible. 3. Monitor logs and network traffic for suspicious command execution patterns or anomalous behavior indicative of exploitation attempts. 4. Consider deploying application-layer firewalls or intrusion prevention systems with custom rules to detect and block command injection attempts targeting HummerRisk. 5. If feasible, isolate HummerRisk deployments in segmented environments with minimal privileges to limit potential damage. 6. Engage with the vendor or community to obtain patches or updated versions addressing this vulnerability as soon as they become available. 7. As a temporary measure, evaluate alternative cloud compliance scanning tools with active support and security updates. 8. Conduct thorough security assessments and penetration testing focused on command injection vectors within HummerRisk deployments. 9. Educate relevant IT and security teams about this vulnerability to ensure rapid detection and response to potential exploitation attempts.