CVE-2026-6239
Stack-Based Buffer Overflow in Tapo C520WS v2 ONVIF Service
Publication date: 2026-06-06
Last updated on: 2026-06-06
Assigner: TPLink
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| tp_link | tapo_c520ws | 2 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-121 | A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). |
Attack-Flow Graph
AI Powered Q&A
What immediate steps should I take to mitigate this vulnerability?
The CVE description does not provide specific mitigation steps or recommended commands for CVE-2026-6239.
Since the vulnerability affects the ONVIF CreateUsers service on the TP-Link Tapo C520WS v2 device, general best practices include restricting authenticated access to trusted users only and monitoring for unusual ONVIF requests.
Can you explain this vulnerability to me?
This vulnerability is a stack-based buffer overflow found in the Tapo C520WS v2 device within the ONVIF CreateUsers service. The device does not properly validate the number of XML user nodes when processing requests. An authenticated attacker can exploit this by sending a specially crafted ONVIF request with too many user entries, which causes memory corruption.
How can this vulnerability impact me? :
If successfully exploited, this vulnerability can cause the ONVIF management service on the device to crash unexpectedly. This results in a denial-of-service (DoS) condition that disrupts the device's configuration and management functions, potentially preventing legitimate users from managing the device.