PT-2023-2019 · Tp Link · Tp-Link Archer Ax21

Xiaobye · Published 2023-01-11 · Updated 2025-08-06 · CVE-2023-27332

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions TP-Link Archer AX21 (affected versions not specified)

Description The issue is caused by a buffer overflow in the tdpServer microprogram of TP-Link Archer AX21 routers. This allows a remote attacker to execute arbitrary code on affected installations. The flaw exists within the logging functionality of the tdpServer program, which listens on UDP port 20002. 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. Authentication is not required to exploit this vulnerability.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

BDU:2023-01730

CVE-2023-27332

ZDI-23-245

Affected Products

Tp-Link Archer Ax21

References · 9

• https://zerodayinitiative.com/advisories/ZDI-23-245 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-27332 · Security Note
• https://bdu.fstec.ru/vul/2023-01730 · Security Note
• https://osv.dev/vulnerability/CVE-2023-27332 · Vendor Advisory
• https://tp-link.com/us/support/download/archer-ax21/#Firmware · Note
• https://cve.report/CVE-2023-27332 · Note
• https://t.me/cveNotify/131072 · Telegram Post
• https://zerodayinitiative.com/advisories/ZDI-CAN-19898 · Note
• https://t.me/cvenotify/78945 · Telegram Post