EUVD-2026-39148
GHSA-g493-6gcx-x935
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable JSON-RPC daemon with low-complexity command injection; PR:L reflects the stated credential requirement, though the documented auth bypass could justify PR:N, with full SYSTEM-level C/I/A impact.
Primary rating from Vendor (trendmicro).
CVSS VectorVendor: trendmicro
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionCVE.org
Quest NetVault Backup NVBULogDaemon Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Quest NetVault Backup. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.
The specific flaw exists within the processing of NVBULogDaemon JSON-RPC messages. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-27625.
AnalysisAI
Remote code execution in Quest NetVault Backup allows authenticated remote attackers - who can bypass the product's existing authentication mechanism - to run arbitrary OS commands as SYSTEM via the NVBULogDaemon JSON-RPC interface. The flaw stems from unsanitized user-supplied input being passed into a system call (CWE-78), and the credentialed authentication barrier is undermined by an acknowledged bypass, effectively widening exposure. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network access to the NVBULogDaemon JSON-RPC message interface on a Quest NetVault Backup installation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.0 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, 8.8) indicates network-reachable, low-complexity exploitation requiring only low privileges and no user interaction, with full confidentiality, integrity, and availability impact - a serious profile for a backup server that typically holds privileged access to many systems. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with network reach to the NetVault management interface leverages the documented authentication bypass to gain access, then sends a crafted NVBULogDaemon JSON-RPC message embedding shell metacharacters in a string that the daemon passes to a system call. Given low attack complexity and no required user interaction, the injected command executes as SYSTEM, granting full control of the backup server and a pivot point into the protected backup estate. … |
| Remediation | Upgrade Quest NetVault Backup to the fixed release indicated in the vendor's NetVault 14.0.2 release notes (https://support.quest.com/technical-documents/netvault/14.0.2/release-notes#TOPIC-2338529); the referenced release notes point to 14.0.2 as the relevant patched line, but confirm the exact fixed build with Quest support before deploying. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all NetVault Backup instances and restrict network access to the NVBULogDaemon interface (limit to trusted administrative networks). …
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Same weakness CWE-78 – OS Command Injection
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External POC / Exploit Code
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