InfoSecBulletin Cybersecurity for mankind
A security alert from TP-Link has revealed several flaws—from CVE-2026-34118 to CVE-2026-34124— that impact the Tapo C520WS v2.6 outdoor security camera.
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The most critical threat in this batch is CVE-2026-34121, an authentication bypass vulnerability within the camera’s configuration service. The issue stems from “inconsistent parsing and authorization logic in JSON requests during authentication check”.
An unlogged attacker can add a special action to a request that usually needs permission. By riding along with a safe command, they can get past security checks.
“Successful exploitation allows unauthenticated execution of restricted configuration actions, which may result in unauthorized modification of device state,” the advisory warns.
Several flaws can cause a Denial-of-Service (DoS) condition, which can “blind” the security camera, besides unauthorized access.
CVE-2026-34118: Occurs in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation.
CVE -2026-34119: Occurs in the HTTP parsing loop when appending segmented request bodies without continuous write‑boundary verification.
CVE -2026-34120: Occurs within the asynchronous parsing of local video stream content due to insufficient alignment and validation of buffer boundaries when processing streaming inputs.
If you have a TP-Link Tapo C520WS v2.6, you might be affected if your firmware version is older than 1.2.4 Build 260326 Rel.24666n.
TP-Link has acted swiftly to resolve these issues and “strongly advises users with affected devices” to take prompt action. In the era of the Internet of Things (IoT), maintaining security requires continuous vigilance. To secure your Tapo camera, please follow these steps without delay:
Update Firmware: Download and install the latest firmware version directly from the official TP-Link support page.
US: Download for Tapo C520WS | TP-Link
EN: Download for Tapo C520WS | TP-Link
