TI-2023-12068 Aliases CVE-2023-27333 GHSA-r8gh-qf5p-8r62

Stack-based buffer overflow in TP-Link Archer AX21

LOW 33CWE-121Published 2024-05-03 · Updated 2024-09-18

Key facts

Attack vector: Adjacent network
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00738 54th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
TP-Link	Archer AX21	1.1.3 Build 20221125	—	No fix listed	CNA

Archer AX21 VendorTP-Link Affected 1.1.3 Build 20221125 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:tp-link:archer_ax21_firmware:1.1.3:build_20221125::::::	1.1.3 build_20221125	Vulnerable	TP-Link
cpe:2.3:h:tp-link:archer_ax21:-:::::::*	not specified by NVD	Running on	TP-Link

cpe:2.3:o:tp-link:archer_ax21_firmware:1.1.3:build_20221125:*:*:*:*:*:* Versions 1.1.3 build_20221125 Vulnerable ·TP-Link
cpe:2.3:h:tp-link:archer_ax21:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TP-Link

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-27333
2026-10-03 Alias added: GHSA-r8gh-qf5p-8r62

References

Advisory 1

ZDI-23-244

TI-2023-01313 Command injection in TP-Link Archer AX21 KEVCVSS 3.1HIGH 8.8
TI-2023-15182 TP-Link Archer AX21(US)_V3_1.1.4 Build 20230219 and AX21(US)_V3.6_1.1.4 Build 20230219… CVSS 3.1CRITICAL 9.8
TI-2023-12094 Race condition in TP-Link AX1800 CVSS 3.1HIGH 8.1
TI-2023-12081 Stack-based buffer overflow in TP-Link AX1800 CVSS 3.0HIGH 8.8
TI-2023-12067 Stack-based buffer overflow in TP-Link Archer AX21 CVSS 3.0HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences