CVE-2018-25115Known exploitationPublic exploitNetwork attack vector

Unauthenticated command execution via unsanitized CHECKFW parameter

Published Aug 27, 2025 · Updated May 25, 2026

OS command injection in service.cgi on six D-Link DIR-series routers allows remote attackers to execute arbitrary commands without authentication. The endpoint passes the EVENT=CHECKFW value directly to the system shell without sanitizing command separators in a crafted HTTP POST body. No credentials or user interaction are required, and injected commands run with root privileges, allowing full device compromise.

CVSS severity9.8
Critical
EPSS probability10.43%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in service.cgi on six D-Link DIR-series routers allows remote attackers to execute arbitrary commands without authentication. The endpoint passes the EVENT=CHECKFW value directly to the system shell without sanitizing command separators in a crafted HTTP POST body. No credentials or user interaction are required, and injected commands run with root privileges, allowing full device compromise.

The record

CVE
CVE-2018-25115
Published
Aug 27, 2025
Updated
May 25, 2026
Vendor
D-Link
Product
DIR-615
Classifications
CWE-78, T1190, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2025Exploitation reportedShadowserver exploitation observation
  2. Aug 27, 2025CVE publishedPublication date reported by the CVE source.
  3. May 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DIR-615version=*
D-Link · DIR-645version=*
D-Link · DIR-815version=1.03
D-Link · DIR-110version=*
D-Link · DIR-412version=*
D-Link · DIR-600version=*

Published CVSS scores

10.0VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1190Exploit Public-Facing Application
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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