CVE-2023-27333

TP-Link Archer AX21 tmpServer Command 0x422 Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Archer AX21 routers. Authentication is required to exploit this vulnerability. The specific flaw exists within the handling of command 0x422 provided to the tmpServer service. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-19905.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

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

Exploitability : 0.9 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.zerodayinitiative.com/advisories/ZDI-23-244/	Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-23-244/	Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:tp-link:archer_ax21_firmware:1.1.3:build_20221125:*:*:*:*:*:*

cpe:2.3:h:tp-link:archer_ax21:-:*:*:*:*:*:*:*

History

06 Aug 2025, 14:24

Type	Values Removed	Values Added
CPE		cpe:2.3:o:tp-link:archer_ax21_firmware:1.1.3:build_20221125:::::: cpe:2.3:h:tp-link:archer_ax21:-:::::::*
References	~~() https://www.zerodayinitiative.com/advisories/ZDI-23-244/ -~~	() https://www.zerodayinitiative.com/advisories/ZDI-23-244/ - Third Party Advisory
First Time		Tp-link archer Ax21 Firmware Tp-link Tp-link archer Ax21

Information

Published : 2024-05-03 02:15

Updated : 2025-08-06 14:24

NVD link : CVE-2023-27333

Mitre link : CVE-2023-27333

CVE.ORG link : CVE-2023-27333

JSON object : View

Products Affected

tp-link

archer_ax21_firmware
archer_ax21

CWE

CWE-121

Stack-based Buffer Overflow

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