External risk intelligence

Improper Access Control in actidata actiNAS SL 2U-8 RDX Allows Unauthenticated Data Reading and Modification.

CVE advisorySeverity: CRITICAL (CVSS 9.1)

CVE-2023-51947

This vulnerability affects a NAS (Network Attached Storage) device management interface. Such devices and their administrative portals are commonly deployed as network-accessible services, and in many enterprise or small business environments, these management interfaces are frequently exposed or reachable via the network.

Missing Authentication

Actidata Actinas Sl 2u 8 Rdx Firmware

3.2.03

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This CVE involves improper access control in the management interface of actidata network storage devices, potentially allowing unauthenticated attackers to read and modify data. The primary concern is to confirm if these devices are in use and exposed to the network.

Unauthenticated access to network storage data.
Critical management flaw impacts data integrity.
Confirm relevance and assess potential exposure.

Attack Path

How an attacker could exploit the issue

An attacker could reach the vulnerable component by sending unauthenticated requests over the network to the device's management interface. This improper access control in the nasSvr.php file allows an attacker to read and modify various types of data. When triggered, this could lead to unauthorized access and modification of sensitive information stored on the device.

Unauthenticated network access required.
Manipulates data via nasSvr.php.
Unauthorized data reading and modification.

Live Threat

Current exploitation, exposure, and threat context

When supported by the advisory, unauthenticated remote attackers could read and modify various types of data on the nasSvr.php service.

System data could be at risk.
Unauthorized access to modify data.
Potential for data integrity loss.

Operational Fix

Recommended remediation, mitigation, and detection steps

The actidata NAS device firmware is likely managed by an infrastructure or platform team responsible for network-attached storage. The immediate priority is to identify all deployed actidata NAS devices, assess their network exposure, and determine business criticality to inform the risk-based remediation plan.

Infrastructure or platform teams should own.
Verify network exposure and business impact.
Plan remediation based on identified risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is the actidata actiNAS SL 2U-8 RDX?

It is a network-attached storage (NAS) system used for centralized data backup and file management in business environments. This device typically includes a web-based management interface that allows administrators to configure storage settings, manage user access, and oversee data operations through the network.

What does CWE-306 mean for CVE-2023-51947?

CWE-306 refers to 'Missing Authentication for Critical Function.' In the context of this CVE, it means the system performs sensitive operations—such as reading or changing stored data—without first verifying the identity of the user. Because the software fails to require a password or session token, any user who can reach the affected component can interact with it as if they were an authorized administrator.

How is this vulnerability triggered?

The vulnerability is triggered when an attacker sends specific, unauthenticated network requests directly to the nasSvr.php file on the device. It is important to note that the flaw exists within the management logic itself; simply having the device powered on or connected to a network is not the trigger. An attacker must actively send crafted traffic to that specific file to bypass the intended access controls.

Is my actidata NAS at risk?

According to Halo Surface Signal, this vulnerability is considered highly relevant if your device's management interface is reachable over the network. While these interfaces are often meant for internal use, they are frequently exposed to broader network segments, increasing the likelihood that an unauthorized party could reach the vulnerable file. If your NAS management portal is accessible from outside your local network, your risk profile is significantly higher.

How should I respond to CVE-2023-51947?

Start by identifying all actidata actiNAS units within your infrastructure. Once you have an inventory, verify whether their management interfaces are exposed to the network. Prioritize restricting access to these interfaces by isolating them behind firewalls or VPNs, ensuring they are not reachable by unauthorized users. Finally, consult official actidata resources to determine if a firmware update is available to resolve the underlying access control issue.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.