CVE-2026-8345: D-Link DIR-816 singlePortForward sub_445E7C command injection
A security vulnerability has been detected in D-Link DIR-816 1.10CNB05R1B011D88210. Affected by this issue is the function sub445E7C of the file /goform/singlePortForward. Such manipulation of the argument ipaddress leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
Disable the single-port forwarding feature or the /goform/singlePortForward endpoint in the router configuration. If the firmware UI does not provide a specific toggle, disable port forwarding functionality entirely or remove any existing single-port forwarding rules.
D-Link DIR-816 web/port-forwarding functionality singlePortForward (endpoint /goform/singlePortForward) = disabled - Compensating control
Block or restrict remote (WAN) access to the router management interface and the /goform/singlePortForward endpoint. Apply firewall/ACL rules to only allow management access from trusted IPs, and block HTTP(S) requests to the singlePortForward endpoint from untrusted networks.
- Operational
Assume devices may have been exploited; inspect affected routers for signs of compromise, perform a factory reset or reflash known-good firmware image, and change administrative credentials. Monitor vendor advisories and apply any vendor-supplied firmware updates as soon as they become available.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-8345?
CVE-2026-8345 is classified as a high severity vulnerability due to potential remote command injection.
How do I fix CVE-2026-8345?
To fix CVE-2026-8345, update the D-Link DIR-816 router firmware to the latest version provided by D-Link.
What impact does CVE-2026-8345 have on my device?
CVE-2026-8345 allows attackers to execute arbitrary commands on the D-Link DIR-816 device, compromising its security.
Is CVE-2026-8345 remotely exploitable?
Yes, CVE-2026-8345 can be exploited remotely if the attacker has access to the network hosting the vulnerable D-Link DIR-816 device.
Which versions are affected by CVE-2026-8345?
CVE-2026-8345 specifically affects the D-Link DIR-816 version 1.10CNB05_R1B011D88210.