CVE-2023-39638Network attack vector

Unauthenticated command execution via lxmldbc_system

Published Sep 14, 2023 · Updated Sep 26, 2024

Command injection in D-Link DIR-859 A1 1.05 and 1.06B01 Beta01 allows remote attackers to execute commands through the CGI service. The /htdocs/cgibin handler invokes lxmldbc_system on unneutralized request data, allowing shell metacharacters to alter the command. The CGI service is network-reachable without authentication, and successful injection executes commands with the router service's privileges.

CVSS severity9.8
Critical
EPSS probability3.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in D-Link DIR-859 A1 1.05 and 1.06B01 Beta01 allows remote attackers to execute commands through the CGI service. The /htdocs/cgibin handler invokes lxmldbc_system on unneutralized request data, allowing shell metacharacters to alter the command. The CGI service is network-reachable without authentication, and successful injection executes commands with the router service's privileges.

The record

CVE
CVE-2023-39638
Published
Sep 14, 2023
Updated
Sep 26, 2024
Vendor
D-Link
Product
DIR-859
Classifications
CWE-77, T1190, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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=1.05
  2. Affected versionversion=1.06b01

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DIR-859version=1.05; version=1.06b01

Published CVSS scores

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.

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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 exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1190Exploit Public-Facing Application
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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