CVE-2026-34120: high-severity vulnerability in TP-Link Systems Inc. Tapo C520WS v2.6
Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C520WS
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.2%
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.
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
TP-Link Systems Inc. · Tapo C520WS v2.6Related CVEs — TP-Link Systems Inc. Tapo C520WS v2.6
In the same product, most dangerous first.
CVE-2025-8065HIGHRemote Code Execution via Stack-based Buffer Overflow in ONVIF SOAP Parser in TP-Link Tapo C200 and C520WSEPSS 0.5%CVE-2026-34121HIGHAuthentication Bypass in DS Configuration Service via HTTP Request Parsing Differential of TP-Link Tapo C520WS and C210EPSS 0.5%CVE-2026-34118HIGHHeap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in multiple TP-Link Tapo CamerasEPSS 0.4%CVE-2026-34124HIGHDenial of Service via Path Expansion Overflow in HTTP Service in TP-Link Tapo C520WSEPSS 0.3%CVE-2026-34122HIGHStack-based Buffer Overflow Leading to Denial of Service in TP-Link Tapo C520WSEPSS 0.3%CVE-2026-34119HIGHHeap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C520WSEPSS 0.2%