# CVE-2026-6014: D-Link DIR-513 buffer overflow in formAdvanceSetup

Source: https://junglewise.ai/threats/cve-2026-6014-d-link-dir-513-buffer-overflow-in-formadvancesetup  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-10. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2026-6014 · Severity: high · CVSS 8.8 · Published 2026-04-10

A security vulnerability has been identified in the D-Link DIR-513 router, a device used to provide wireless networking for homes or small offices. An attacker can exploit this flaw to cause a system crash or potentially take control of the device by sending a specially crafted web request. This product is no longer supported by the manufacturer, meaning no official security updates will be released to fix this issue.

Technologies: [Dlink Dir-513](https://junglewise.ai/threats/technologies/dir-513), [Dlink Dir-513 Firmware](https://junglewise.ai/threats/technologies/dir-513-firmware). Vendors: [Dlink](https://junglewise.ai/threats/vendors/dlink).

## Quick answers

**Is CVE-2026-6014 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-6014 being exploited in the wild.

**How severe is CVE-2026-6014?** High severity, with a CVSS score of 8.8, published 10 April 2026.

**Which products and versions are affected?** D-Link DIR-513 1.10.

**Is there a fix for CVE-2026-6014?** 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-2026-6014 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-6014?** Check whether you run Dlink Dir-513 or Dlink Dir-513 Firmware. 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 classic buffer overflow vulnerability exists in the D-Link DIR-513 firmware version 1.10. The flaw is located within the 'formAdvanceSetup' function of the '/goform/formAdvanceSetup' endpoint, which serves as a POST request handler. By manipulating the 'webpage' argument, a remote attacker with low privileges can trigger a memory corruption. This can lead to arbitrary code execution or a complete system crash (DoS). Public exploit code is reportedly available. As the device is end-of-life (EOL), no patch is expected from the vendor.

## Affected products

- D-Link DIR-513 1.10

## Timeline

- 2026-04-10: disclosed: Initial vulnerability disclosure
- 2026-04-10: advisory: NVD publication date

## References

- [https://lavender-bicycle-a5a.notion.site/D-Link-DIR-513-formAdvanceSetup-33153a41781f80829d47ec9b86dd8abf?source=copy_link](https://lavender-bicycle-a5a.notion.site/D-Link-DIR-513-formAdvanceSetup-33153a41781f80829d47ec9b86dd8abf?source=copy_link)
- [https://vuldb.com/submit/791860](https://vuldb.com/submit/791860)
- [https://vuldb.com/vuln/356570](https://vuldb.com/vuln/356570)
- [https://vuldb.com/vuln/356570/cti](https://vuldb.com/vuln/356570/cti)
- [https://www.dlink.com/](https://www.dlink.com/)

## Related threats

- [D-Link DIR-513 buffer overflow in formSetRoute](https://junglewise.ai/threats/cve-2026-6013-d-link-dir-513-buffer-overflow-in-formsetroute)
- [D-Link DIR-513 buffer overflow in formSetPassword](https://junglewise.ai/threats/cve-2026-6012-d-link-dir-513-buffer-overflow-in-formsetpassword)