CVE-2026-34120
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk14th percentile - higher than 14% of all known CVEs
Summary
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).
Risk Assessment
The attack can crash the device or make it unresponsive, disabling video monitoring and potentially compromising physical security.
Recommendation
Contact the vendor for a patch. If unavailable, consider isolating the device from the network or using firewalls.
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-2026-34122Medium
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.
- 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-2026-34119Medium
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 heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the asynchronous parsing of local video stream content due to insufficient alignment and validation of buffer boundaries when processing streaming inputs.An attacker on the same network segment could trigger heap memory corruption conditions by sending crafted payloads that cause write operations beyond allocated buffer boundaries. Successful exploitation causes a Denial-of-Service (DoS) condition, causing the device’s process to crash or become unresponsive.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS