CVE-2026-18167: CWE-121 Stack-based buffer overflow in TP-Link Systems Inc. Archer AX55 v4
Description
A stack-based buffer overflow vulnerability exists in the EasyMesh module of TP-Link Archer AX55 v4. When Mesh mode is enabled, a LAN attacker may submit crafted input that causes the easymesh daemon to crash and may potentially achieve remote code execution on the device. Successful exploitation may cause the EasyMesh daemon to crash and may potentially allow remote code execution when Mesh mode is enabled. This may result in high impact to the confidentiality, integrity, and availability of the affected device.
CVSS v4.0
Score 7.7high
Affected software
TP-Link Systems Inc.
Archer AX55 v4
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18167 is a stack-based buffer overflow vulnerability in the EasyMesh module of TP-Link Archer AX55 v4 routers. The flaw can be triggered by a LAN attacker submitting specially crafted input when Mesh mode is enabled, causing the easymesh daemon to crash and potentially enabling remote code execution on the device. This vulnerability affects the device's confidentiality, integrity, and availability. The CVSS 4.0 vector indicates attack complexity is high, privileges required are none, and user interaction is none, with high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation may cause the EasyMesh daemon to crash and potentially allow remote code execution on the affected device. This can lead to compromise of confidentiality, integrity, and availability of the router and potentially the network it serves.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, consider disabling Mesh mode if feasible to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TPLink
- Date Reserved
- 2026-07-28T20:48:04.039Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a99f6b5acd9273b49907d9d
Added to database: 09/03/2026, 22:37:41 UTC
Last enriched: 09/07/2026, 11:58:40 UTC
Last updated: 10/19/2026, 06:48:15 UTC
Views: 106
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