CVE-2026-34122: CWE-121 Stack-based buffer overflow in TP-Link Systems Inc. Tapo C520WS v2.6
CVE-2026-34122 is a stack-based buffer overflow vulnerability in TP-Link Tapo C520WS v2. 6 caused by insufficient input validation in a configuration handling component. An attacker can trigger this by providing an excessively long configuration parameter value, leading to a stack overflow. Successful exploitation results in a denial-of-service condition, causing the device to crash or reboot and impacting availability. There is no information on an available patch or vendor advisory. No known exploits are reported in the wild.
AI Analysis
Technical Summary
This vulnerability (CWE-121) exists in TP-Link Tapo C520WS version 2.6 due to improper input validation of configuration parameters. When an attacker supplies an overly long value, it causes a stack-based buffer overflow, which can crash the device or cause it to reboot, resulting in denial of service. The CVSS 4.0 base score is 7.1, reflecting high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on availability. No patch or official remediation details are currently provided.
Potential Impact
Exploitation leads to denial of service by crashing or rebooting the affected device, impacting availability. There is no indication of code execution or confidentiality/integrity impact. No known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to device configuration interfaces to trusted users only to reduce exposure.
CVE-2026-34122: CWE-121 Stack-based buffer overflow in TP-Link Systems Inc. Tapo C520WS v2.6
Description
CVE-2026-34122 is a stack-based buffer overflow vulnerability in TP-Link Tapo C520WS v2. 6 caused by insufficient input validation in a configuration handling component. An attacker can trigger this by providing an excessively long configuration parameter value, leading to a stack overflow. Successful exploitation results in a denial-of-service condition, causing the device to crash or reboot and impacting availability. There is no information on an available patch or vendor advisory. No known exploits are reported in the wild.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-121) exists in TP-Link Tapo C520WS version 2.6 due to improper input validation of configuration parameters. When an attacker supplies an overly long value, it causes a stack-based buffer overflow, which can crash the device or cause it to reboot, resulting in denial of service. The CVSS 4.0 base score is 7.1, reflecting high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on availability. No patch or official remediation details are currently provided.
Potential Impact
Exploitation leads to denial of service by crashing or rebooting the affected device, impacting availability. There is no indication of code execution or confidentiality/integrity impact. No known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to device configuration interfaces to trusted users only to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TPLink
- Date Reserved
- 2026-03-25T18:54:03.343Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69cea98ae6bfc5ba1defd46d
Added to database: 4/2/2026, 5:38:18 PM
Last enriched: 4/9/2026, 11:59:51 PM
Last updated: 5/20/2026, 8:49:58 PM
Views: 41
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