What is CVE-2026-34118?

CVE-2026-34118 is a medium-severity vulnerability in Tp-link Tapo_c520ws, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2026-04-02.

How severe is CVE-2026-34118?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Tp-link Tapo_c520ws

CVE-2026-34118

A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to insufficient boundary validat…

Vulnerability class: Buffer Overflow

EPSS: 0.003 (17.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Tp-link Tapo_c520ws — versions 2.6
Tp-link Tapo_c520ws_firmware
Tp-link Systems Inc. Tapo C520ws V2.6 — versions 0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

f23511db-6c3e-4e32-a477-6aa17d310630 (Release Notes, patch)
f23511db-6c3e-4e32-a477-6aa17d310630 (Release Notes, patch)
f23511db-6c3e-4e32-a477-6aa17d310630 (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-34118?: CVE-2026-34118 is a medium-severity vulnerability in Tp-link Tapo_c520ws, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2026-04-02.
How severe is CVE-2026-34118?: Medium severity. CVSS v3 base score is 6.5 out of 10.