# CVE-2026-6013: D-Link DIR-513 buffer overflow in formSetRoute

Source: https://junglewise.ai/threats/cve-2026-6013-d-link-dir-513-buffer-overflow-in-formsetroute  
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-2026-6013 · Severity: high · CVSS 8.8 · Published 2026-04-10

A security vulnerability exists in the D-Link DIR-513 router, a device used to provide wireless networking for homes or small offices. An attacker could exploit this flaw to take control of the device or cause it to crash, potentially leading to a complete loss of internet connectivity and unauthorized access to the local network. Because this product is no longer supported by the manufacturer, no official security updates will be released, and users are advised to replace the device.

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-2026-6013 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-6013 being exploited in the wild.

**How severe is CVE-2026-6013?** 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-2026-6013?** 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-2026-6013 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-6013?** 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 stack-based buffer overflow vulnerability exists in the D-Link DIR-513 router (firmware version 1.10) within the POST Request Handler component. Specifically, the 'formSetRoute' function in the '/goform/formSetRoute' file fails to properly validate the length of the 'curTime' argument. A remote attacker with low-level privileges can exploit this by sending a specially crafted POST request to overwrite memory, potentially leading to remote code execution (RCE) or a denial of service (DoS). This product is end-of-life (EOL), and public exploit code is reportedly available.

## Affected products

- D-Link DIR-513 1.10

## Timeline

- 2026-04-10: advisory: Initial disclosure by VulDB and NVD

## References

- [https://lavender-bicycle-a5a.notion.site/D-Link-DIR-513-formSetRoute-33153a41781f80f7aed1d3614c199d85?source=copy_link](https://lavender-bicycle-a5a.notion.site/D-Link-DIR-513-formSetRoute-33153a41781f80f7aed1d3614c199d85?source=copy_link)
- [https://vuldb.com/submit/791859](https://vuldb.com/submit/791859)
- [https://vuldb.com/vuln/356569](https://vuldb.com/vuln/356569)
- [https://vuldb.com/vuln/356569/cti](https://vuldb.com/vuln/356569/cti)
- [https://www.dlink.com/](https://www.dlink.com/)

## Related threats

- [D-Link DIR-513 buffer overflow in formAdvanceSetup](https://junglewise.ai/threats/cve-2026-6014-d-link-dir-513-buffer-overflow-in-formadvancesetup)
- [D-Link DIR-513 buffer overflow in formSetPassword](https://junglewise.ai/threats/cve-2026-6012-d-link-dir-513-buffer-overflow-in-formsetpassword)