# CVE-2026-8346: D-Link DIR-816 command injection in portForward

Source: https://junglewise.ai/threats/cve-2026-8346-d-link-dir-816-command-injection-in-portforward  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-12. Updated: 2026-05-12  
License: CC BY 4.0 with a link back

CVE-2026-8346 · Severity: medium · CVSS 6.3 · Published 2026-05-12

A vulnerability exists in the D-Link DIR-816 wireless router, a device used to provide internet connectivity for home and small office environments. An attacker can remotely execute unauthorized commands on the router by manipulating the port forwarding settings. This could lead to a complete takeover of the device, allowing the attacker to intercept network traffic or disrupt internet services.

Technologies: [D-Link DIR-816](https://junglewise.ai/threats/technologies/dir-816). Vendors: [D-Link](https://junglewise.ai/threats/vendors/d-link).

## Quick answers

**Is CVE-2026-8346 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-8346 being exploited in the wild.

**How severe is CVE-2026-8346?** Medium severity, with a CVSS score of 6.3, published 12 May 2026.

**Which products and versions are affected?** D-Link DIR-816 1.10CNB05_R1B011D88210.

**Is there a fix for CVE-2026-8346?** 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-2026-8346 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-8346?** Check whether you run D-Link DIR-816 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 vulnerability (CWE-77) exists in the D-Link DIR-816 router firmware version 1.10CNB05_R1B011D88210. The flaw is located within the 'portForward' function, where the 'ip_address' argument is improperly neutralized before being used in a system command. A remote attacker with low privileges can exploit this by sending a specially crafted request to the device's web management interface. Successful exploitation allows for arbitrary command execution on the underlying operating system. Public exploit code is reportedly available.

## Affected products

- D-Link DIR-816 1.10CNB05_R1B011D88210

## Timeline

- 2026-05-12: disclosed: Vulnerability published on NVD and VulDB.

## References

- [https://github.com/lipenghai/iot_bug/blob/main/D-Link/DIR816/3.md](https://github.com/lipenghai/iot_bug/blob/main/D-Link/DIR816/3.md)
- [https://vuldb.com/submit/811380](https://vuldb.com/submit/811380)
- [https://vuldb.com/vuln/362662](https://vuldb.com/vuln/362662)
- [https://vuldb.com/vuln/362662/cti](https://vuldb.com/vuln/362662/cti)
- [https://www.dlink.com/](https://www.dlink.com/)

## Related threats

- [D-Link DIR-816 command injection in singlePortForward](https://junglewise.ai/threats/cve-2026-8345-d-link-dir-816-command-injection-in-singleportforward)
- [D-Link DIR-816 command injection in formDMZ.cgi](https://junglewise.ai/threats/cve-2026-8344-d-link-dir-816-command-injection-in-formdmz-cgi)