CVE-2023-43128Network attack vector

Unauthenticated command execution via HTTP_ST filtering

Published Sep 21, 2023 · Updated Sep 25, 2024

Command injection in D-Link DIR-806 firmware 100CNb11 allows remote attackers to execute arbitrary commands through crafted HTTP_ST values. HTTP_ST parameter processing fails to neutralize command-special input before incorporating the value into an operating-system command. No authentication or user interaction is required, and successful exploitation grants control over the device through attacker-supplied commands.

CVSS severity9.8
Critical
EPSS probability2.42%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in D-Link DIR-806 firmware 100CNb11 allows remote attackers to execute arbitrary commands through crafted HTTP_ST values. HTTP_ST parameter processing fails to neutralize command-special input before incorporating the value into an operating-system command. No authentication or user interaction is required, and successful exploitation grants control over the device through attacker-supplied commands.

The record

CVE
CVE-2023-43128
Published
Sep 21, 2023
Updated
Sep 25, 2024
Vendor
D-Link
Product
DIR-806
Classifications
CWE-77, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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?

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  1. Affected versionversion=0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DIR-806version=0

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')
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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