CVE-2024-39202

Authenticated command execution via DHCP start address

Published Jul 8, 2024 · Updated Aug 2, 2024

OS command injection in D-Link DIR-823X firmware 240126 allows remote authenticated users to execute arbitrary commands via LAN settings. The /goform/set_lan_settings handler accepts shell metacharacters in dhcpd_startip without neutralization before OS-command use. Access to the router management interface and low privileges are required, and successful commands can read or alter data or interrupt service.

CVSS severity8.8
High
EPSS probability1.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in D-Link DIR-823X firmware 240126 allows remote authenticated users to execute arbitrary commands via LAN settings. The /goform/set_lan_settings handler accepts shell metacharacters in dhcpd_startip without neutralization before OS-command use. Access to the router management interface and low privileges are required, and successful commands can read or alter data or interrupt service.

The record

CVE
CVE-2024-39202
Published
Jul 8, 2024
Updated
Aug 2, 2024
Vendor
D-Link Corporation
Product
DIR-823X Firmware
Classifications
CWE-78, T1059
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=240126

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

D-Link Corporation · DIR-823X Firmwareversion=240126

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.6CISA-ADPCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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