What’s Vulnerable › Vulnerabilities

CVE-2024-21821

• Severity: high (CVSS 8.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-11 · updated 2026-06-17
• Weakness: CWE-78

Description

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

• TP-Link Archer Ax3000 Firmware: before 1.1.2 — fixed in 1.1.2
• TP-Link Archer Ax5400 Firmware: before 1.1.2 — fixed in 1.1.2
• TP-Link Systems Inc. AXE75 V1: before 1.1.9 — fixed in 1.1.9

How to fix

Upgrade to a fixed version: TP-Link Archer Ax3000 Firmware 1.1.2; TP-Link Archer Ax5400 Firmware 1.1.2; TP-Link Systems Inc. AXE75 V1 1.1.9. Check the vendor advisory for mitigations.

References

• https://jvn.jp/en/vu/JVNVU91401812/
• https://www.tp-link.com/jp/support/download/archer-air-r5/v1/#Firmware
• https://www.tp-link.com/jp/support/download/archer-ax3000/#Firmware
• https://www.tp-link.com/jp/support/download/archer-ax5400/#Firmware
• https://www.tp-link.com/jp/support/download/archer-axe75/#Firmware
• https://jvn.jp/en/vu/JVNVU91401812/
• https://www.tp-link.com/jp/support/download/archer-air-r5/v1/#Firmware
• https://www.tp-link.com/jp/support/download/archer-ax3000/#Firmware
• https://www.tp-link.com/jp/support/download/archer-ax5400/#Firmware
• https://www.tp-link.com/jp/support/download/archer-axe75/#Firmware

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