Quick answers
- Is CVE-2026-11339 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-11339 being exploited in the wild.
- How severe is CVE-2026-11339?
- Medium severity, with a CVSS score of 6.3, published 5 June 2026.
- Which products and versions are affected?
- D-Link DWR-M920 up to 1.1.50, 1.1.70.
- Is there a fix for CVE-2026-11339?
- 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-2026-11339 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-11339?
- Check whether you run D-Link DWR-M920 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 command injection and stack-based buffer overflow vulnerability exists in the D-Link DWR-M920 router within the '/boafrm/formUSSDSetup' endpoint. The vulnerability is located in function 'sub_41CF20', where the 'ussdValue' parameter is retrieved from a POST request and passed to 'sprintf' and subsequently 'system()' without adequate sanitization or length checking. An attacker with low-privileged access to the web interface can escape the intended shell command context using single quotes and semicolons (e.g., '; [command] #') to execute arbitrary OS commands. The lack of bounds checking on the same parameter also enables a stack-based buffer overflow. The exploit is publicly disclosed and affects versions up to 1.1.50 and 1.1.70.
Affected products
- D-Link DWR-M920 up to 1.1.50, 1.1.70
Timeline
- 2026-06-05: disclosed: Public disclosure of the vulnerability and exploit code.
- 2026-06-05: advisory: NVD/VulDB advisory published.