# CVE-2026-67248: ASUSTOR ADM stack buffer overflow in File Explorer

Source: https://junglewise.ai/threats/cve-2026-67248-asustor-adm-stack-buffer-overflow-in-file-explorer  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-30. Updated: 2026-07-30  
License: CC BY 4.0 with a link back

CVE-2026-67248 · Severity: info · CVSS 8.7 · Published 2026-07-30

A security vulnerability has been identified in the File Explorer component of ASUSTOR NAS devices. This component is responsible for managing and sharing files stored on the network-attached storage device. An authenticated user could exploit this flaw to crash the file management service, potentially leading to a denial of service or further unauthorized system access, impacting the availability and security of stored data.

Technologies: [ASUSTOR ADM](https://junglewise.ai/threats/technologies/adm). Vendors: [ASUSTOR](https://junglewise.ai/threats/vendors/asustor).

## Quick answers

**Is CVE-2026-67248 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-67248 being exploited in the wild.

**How severe is CVE-2026-67248?** Informational severity, with a CVSS score of 8.7, published 30 July 2026.

**Which products and versions are affected?** ASUSTOR ADM 4.1.0 through 4.3.3.RUN1, 5.0.0 through 5.1.3.RI81.

**Is there a fix for CVE-2026-67248?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-67248 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-67248?** Check whether you run ASUSTOR ADM at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stack-based buffer overflow (CWE-121) exists in the File Explorer component of ASUSTOR Data Master (ADM). The vulnerability is caused by a failure to properly validate user-controlled input before it is decoded and copied into a fixed-size stack buffer within a CGI process. An authenticated attacker can exploit this by sending crafted network requests to trigger the overflow. While the primary confirmed impact is a denial of service of the affected CGI process, the lack of runtime protections could potentially allow for broader exploitation. The vulnerability affects ADM versions 4.1.0 through 4.3.3.RUN1 and 5.0.0 through 5.1.3.RI81.

## Affected products

- ASUSTOR ADM 4.1.0 through 4.3.3.RUN1, 5.0.0 through 5.1.3.RI81

## Timeline

- 2026-07-30: advisory

## References

- [https://www.asustor.com/security/security_advisory_detail?id=69](https://www.asustor.com/security/security_advisory_detail?id=69)

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