What is the CVSS score of CVE-2024-21821?

CVE-2024-21821 has a CVSS 3.1 base score of 8.0 (High). CVSS vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Archer Ax3000 Firmware are affected by CVE-2024-21821?

CVE-2024-21821 presents notable security risk, a OS command injection vulnerability rated CVSS 8.0.

How to fix or mitigate CVE-2024-21821?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. Validate that input sanitization is in place for all user-controlled parameters.

Archer Ax3000 Firmware CVE-2024-21821

HIGH

OS Command Injection (CWE-78)

2024-01-11 vultures@jpcert.or.jp

TP-Link Command Injection Archer Ax3000 Firmware Archer Ax5400 Firmware Archer Axe75 Firmware

8.0

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.0 HIGH

AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:34 vuln.today

CVE Published

Jan 11, 2024 - 00:15 nvd

HIGH 8.0

DescriptionCVE.org

Multiple TP-LINK products allow a network-adjacent authenticated attacker with access to the product from the LAN port or Wi-Fi to execute arbitrary OS commands.

AnalysisAI

Multiple TP-LINK products allow a network-adjacent authenticated attacker with access to the product from the LAN port or Wi-Fi to execute arbitrary OS commands. Rated high severity (CVSS 8.0), this vulnerability is low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as OS Command Injection (CWE-78), which allows attackers to execute arbitrary operating system commands on the host. Multiple TP-LINK products allow a network-adjacent authenticated attacker with access to the product from the LAN port or Wi-Fi to execute arbitrary OS commands. Affected products include: Tp-Link Archer Ax3000 Firmware, Tp-Link Archer Ax5400 Firmware, Tp-Link Archer Axe75 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Avoid passing user input to shell commands. Use language-specific APIs instead of shell execution. Apply strict input validation with allowlists.