CVE-2026-82592: D-Link DIR-825M stack-based buffer overflow in disk formatting handler

CVE-2026-82592 · Severity: critical · CVSS 9.9 · Published 2026-08-30

The D-Link DIR-825M router's disk formatting feature contains a critical vulnerability that allows remote attackers to execute arbitrary commands with root privileges. An unauthenticated attacker can send a specially crafted request to the formatting endpoint to overflow the router's memory, crash the device, or take complete control of the system. This compromises the security of any network protected by the affected router.

Technologies: D-Link DIR-825M. Vendors: D-Link.

Quick answers

Is CVE-2026-82592 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-82592 being exploited in the wild.
How severe is CVE-2026-82592?
Critical severity, with a CVSS score of 9.9, published 30 August 2026.
Which products and versions are affected?
D-Link DIR-825M 1.1.8.
Is there a fix for CVE-2026-82592?
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-2026-82592 attacked?
It is attacked over the network.
Am I affected by CVE-2026-82592?
Check whether you run D-Link DIR-825M 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

The vulnerability is a stack-based buffer overflow (CWE-121) combined with command injection (CWE-78) in the sub_46725C function of the /boafrm/formDiskFormat endpoint. The vulnerable code retrieves a user-controlled partition parameter from HTTP POST requests and passes it directly to sprintf() into a 132-byte stack buffer without any validation, length checks, or sanitization. An attacker can exploit this by sending either an oversized string to trigger buffer overflow and control flow hijacking, or by injecting shell metacharacters (e.g., semicolons, ampersands, pipes) to execute arbitrary system commands via system() with root privileges. The vulnerability is remotely exploitable without authentication, and a public exploit is available. No patch status is currently documented.

Affected products

  • D-Link DIR-825M 1.1.8

Timeline

  • 2026-08-30: disclosed
  • exploited: Public exploit available

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.