CVE-2018-25115

Description

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.

CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-78 OS Command Injection

Affected Products

Vendor	Product	Versions
dlink	dir-110_firmware	All
dlink	dir-110	All
dlink	dir-412_firmware	All
dlink	dir-412	All
dlink	dir-600_firmware	All
dlink	dir-600	All
dlink	dir-610_firmware	All
dlink	dir-610	All
dlink	dir-615_firmware	All
dlink	dir-615	All
dlink	dir-645_firmware	All
dlink	dir-645	All
dlink	dir-815_firmware	All
dlink	dir-815	All

References

Exploits

https://github.com/Cr0n1c/dlink_shell_poc/blob/master/dlink_auth_rce https://www.exploit-db.com/exploits/43496

Other References

https://legacy.us.dlink.com/ https://support.dlink.com/EndOfLifePolicy.aspx https://www.vulncheck.com/advisories/dlink-dir-rce-service-cgi

Frequently Asked Questions

What is CVE-2018-25115? +

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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2018-25115? +

CVE-2018-25115 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2018-25115? +

CVE-2018-25115 affects products from dlink, specifically: dir-110, dir-110_firmware, dir-412, dir-412_firmware, dir-600, dir-600_firmware, dir-610, dir-610_firmware, dir-615, dir-615_firmware, dir-645, dir-645_firmware, dir-815, dir-815_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2018-25115? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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