An OS command injection vulnerability exists in multiple D-Link routers (confirmed on DIR-300 rev A v1.05 and DIR-615 rev D v4.13) via the authenticated toolsvct.xgi CGI endpoint. The web interface fails to properly sanitize user-supplied input in the pingIp parameter, allowing attackers with valid credentials to inject arbitrary shell commands. Exploitation enables full device compromise, including spawning a telnet daemon and establishing a root shell. The vulnerability is present in firmware versions that expose toolsvct.xgi and use the Mathopd/1.5p6 web server. No vendor patch is available, and affected models are end-of-life.

Multiple D-Link DIR-series routers, including DIR-110, DIR-412, DIR-600, DIR-610, DIR-615, DIR-645, and DIR-815 firmware version 1.03, contain a vulnerability in the service.cgi endpoint that allows remote attackers to execute arbitrary system commands without authentication. The flaw stems from improper input handling in the EVENT=CHECKFW parameter, which is passed directly to the system shell without sanitization. A crafted HTTP POST request can inject commands that are executed with root privileges, resulting in full device compromise. These router models are no longer supported at the time of assignment and affected version ranges may vary. Exploitation evidence was first observed by the Shadowserver Foundation on 2025-08-21 UTC.

A vulnerability was found in D-Link DIR-615 4.10. This vulnerability affects unknown code of the file advrouting.php of the component Web Configuration Interface. Performing a manipulation of the argument destip/ submask/ gw results in os command injection. The attack may be initiated remotely. The exploit has been made public and could be used. This vulnerability only affects products that are no longer supported by the maintainer.

A vulnerability has been found in D-Link DIR-615 4.10. This affects an unknown part of the file advfirewall.php of the component DMZ Host Feature. Such manipulation of the argument dmzipaddr  leads to os command injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

A vulnerability was determined in D-Link DIR-615 4.10. Impacted is an unknown function of the file /advmacfilter.php of the component MAC Filter Configuration. This manipulation of the argument mac causes os command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. This vulnerability only affects products that are no longer supported by the maintainer.

A vulnerability was found in D-Link DIR-615 4.10. This issue affects some unknown processing of the file /settempnodes.php of the component URL Filter. The manipulation results in os command injection. The attack can be executed remotely. The exploit has been made public and could be used. This vulnerability only affects products that are no longer supported by the maintainer.

A vulnerability was detected in D-Link DIR-615 up to 4.10. This impacts an unknown function of the file /wizpolicy3machine.php of the component Web Management Interface. Performing a manipulation of the argument ipaddr results in os command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

A vulnerability classified as critical was found in D-Link DAP-1360, DIR-300, DIR-615, DIR-615GF, DIR-615S, DIR-615T, DIR-620, DIR-620S, DIR-806A, DIR-815, DIR-815AC, DIR-815S, DIR-816, DIR-820, DIR-822, DIR-825, DIR-825AC, DIR-825ACF, DIR-825ACG1, DIR-841, DIR-842, DIR-842S, DIR-843, DIR-853, DIR-878, DIR-882, DIR-1210, DIR-1260, DIR-2150, DIR-X1530, DIR-X1860, DSL-224, DSL-245GR, DSL-2640U, DSL-2750U, DSL-G2452GR, DVG-5402G, DVG-5402G, DVG-5402GFRU, DVG-N5402G, DVG-N5402G-IL, DWM-312W, DWM-321, DWR-921, DWR-953 and Good Line Router v2 up to 20240112. This vulnerability affects unknown code of the file /devinfo of the component HTTP GET Request Handler. The manipulation of the argument area with the input notice|net|version leads to information disclosure. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. VDB-251542 is the identifier assigned to this vulnerability.

D-Link DIR-615 before v20.12PTb04 has a second admin account with a 0x1 BACKDOOR value, which might allow remote attackers to obtain access via a TELNET connection.

Cross-site scripting (XSS) vulnerability on D-Link DIR-615 routers 20.07 allows an attacker to inject JavaScript into the "Status -> Active Client Table" page via the hostname field in a DHCP request.

Cross-site scripting (XSS) vulnerability on D-Link DIR-615 routers 20.07 allows attackers to inject JavaScript into the router's admin UPnP page via the description field in an AddPortMapping UPnP SOAP request.

D-Link DIR-615 devices have a buffer overflow via a long Authorization HTTP header.

D-Link DIR-615 2.5.17 devices allow Remote Code Execution via shell metacharacters in the Host field of the System / Traceroute screen.

D-Link DIR-615 T1 devices allow XSS via the Add User feature.

On D-Link DIR-615 devices, the User Account Configuration page is vulnerable to blind XSS via the name field.

On D-Link DIR-615 devices, a normal user is able to create a root(admin) user from the D-Link portal.

Certain D-Link devices have a hardcoded Alphanetworks user account with TELNET access because of /etc/config/imagesign or /etc/alphaconfig/imagesign. This affects DIR-600 B1 V2.01 for WW, DIR-890L A1 v1.03, DIR-615 J1 v100 (for DCN), DIR-645 A1 v1.03, DIR-815 A1 v1.01, DIR-823 A1 v1.01, and DIR-842 C1 v3.00.

The login page on D-Link DIR-615 T1 20.10 devices allows remote attackers to bypass the CAPTCHA protection mechanism and conduct brute-force attacks.

An issue discovered on D-Link DIR-615 devices with firmware version 20.05 and 20.07. wan.htm can be accessed directly without authentication, which can lead to disclosure of information about the WAN, and can also be leveraged by an attacker to modify the data fields of the page.