CVE-2026-34122
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk18th percentile - higher than 18% of all known CVEs
Summary
In TP-Link Tapo C520WS v2.6, a stack-based buffer overflow vulnerability was identified in a configuration handling component due to insufficient input validation. An attacker can supply an excessively long value for a vulnerable configuration parameter, causing a stack overflow. Successful exploitation leads to a Denial-of-Service (DoS) condition, causing service crash or device reboot.
Risk Assessment
An attacker can cause device crash or reboot, leading to monitoring disruption and availability loss.
Recommendation
Update the TP-Link Tapo C520WS firmware to the latest version if available, or restrict access to the configuration interface to trusted networks only.
Other vulnerabilities in TP-Link Tapo C520WS
See all- CVE-2026-34124Medium
TP-Link Tapo C520WS v2.6 has a DoS vulnerability in HTTP request path parsing. Failure to account for path expansion during normalization leads to buffer overflow and memory corruption, potentially causing device reboot.
- CVE-2026-34121High
The TP-Link Tapo C520WS v2.6 camera has an authentication bypass vulnerability in the HTTP handling of the DS configuration service. Inconsistent parsing and authorization logic in JSON requests allows an unauthenticated attacker to append an authentication-exempt action to a request containing privileged DS actions, bypassing access controls.
- CVE-2026-34120Medium
TP-Link Tapo C520WS v2.6 has a heap-based buffer overflow in asynchronous parsing of local video streams. An attacker on the same network can send crafted payloads causing memory corruption and denial of service (DoS).
- CVE-2026-34119Medium
TP-Link Tapo C520WS v2.6 has a heap-based buffer overflow in the HTTP parsing loop when appending segmented request bodies. An attacker on the same network can send crafted payloads causing memory corruption and denial of service (DoS).
Original NVD description (English source)
A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation. An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow. Successful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS