CVE-2024-21821

Authenticated OS command execution via command injection

Published Jan 10, 2024 · Updated Jun 17, 2025

OS command injection in TP-Link Archer router firmware allows remote authenticated users to execute arbitrary commands from LAN or Wi-Fi. JPCERT/CC and TP-Link have not published the affected handler, input parameter, or unsafe command-construction operation. Exploitation requires a valid device login and adjacent access through a LAN port or Wi-Fi, and arbitrary commands can read or modify router data or interrupt service.

CVSS severity7.1
High
EPSS probability0.45%
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 TP-Link Archer router firmware allows remote authenticated users to execute arbitrary commands from LAN or Wi-Fi. JPCERT/CC and TP-Link have not published the affected handler, input parameter, or unsafe command-construction operation. Exploitation requires a valid device login and adjacent access through a LAN port or Wi-Fi, and arbitrary commands can read or modify router data or interrupt service.

The record

CVE
CVE-2024-21821
Published
Jan 10, 2024
Updated
Jun 17, 2025
Vendor
TP-Link
Product
Archer AXE75
Classifications
CWE-78, T1059
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=firmware versions prior to "Archer AXE75(JP)_V1_231115"

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

TP-Link · Archer AXE75version=firmware versions prior to "Archer AXE75(JP)_V1_231115"
TP-Link · Archer Air R5version=firmware versions prior to "Archer Air R5(JP)_V1_1.1.6 Build 20240508"
TP-Link · Archer AX3000version=firmware versions prior to "Archer AX3000(JP)_V1_1.1.2 Build 20231115"
TP-Link · Archer AX5400version=firmware versions prior to "Archer AX5400(JP)_V1_1.1.2 Build 20231115"

Published CVSS scores

8.0NIST NVDCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.0CISA-ADPCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.1JPCERT/CCCVSS:3.1/AV:A/AC:H/PR:L/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)
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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