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CVE-2026-34119— Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C520WS

Quick assessment

Affected
TP-Link Systems Inc. Tapo C520WS v2.6
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TP-Link Tapo C520WS是中国普联（TP-Link）公司的一个WiFi摄像头。 TP-Link Tapo C520WS v2.6版本存在安全漏洞，该漏洞源于HTTP解析循环中追加分段请求体时缺少连续写入边界验证，可能导致堆内存损坏，进而引发拒绝服务攻击。

AI Predicted 5.3 Difficulty: Easy EPSS 0.36% · P28
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I. Basic Information for CVE-2026-34119

Vulnerability Information
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Vulnerability Title
Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C520WS
Source: CVE Program / CVE List V5
Vulnerability Description
A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP parsing loop when appending segmented request bodies without continuous write‑boundary verification, due to insufficient boundary validation when handling externally supplied HTTP input.  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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
TP-Link Tapo C520WS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TP-Link Tapo C520WS是中国普联（TP-Link）公司的一个WiFi摄像头。 TP-Link Tapo C520WS v2.6版本存在安全漏洞，该漏洞源于HTTP解析循环中追加分段请求体时缺少连续写入边界验证，可能导致堆内存损坏，进而引发拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TP-Link Systems Inc. Tapo C520WS v2.6 0 ~ 1.2.4 Build 260326 Rel.24666n -

II. Public POCs for CVE-2026-34119

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III. Intelligence Information for CVE-2026-34119

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Vendor Advisories for CVE-2026-34119 (1)

Same Patch Batch · TP-Link Systems Inc. · 2026-04-02 · 6 CVEs total

CVE-2026-34118 7.1 HIGH Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C100
CVE-2026-34121 Authentication Bypass in DS Configuration Service via HTTP Request Parsing Differential of
CVE-2026-34124 Denial of Service via Path Expansion Overflow in HTTP Service in TP-Link Tapo C520WS
CVE-2026-34122 Stack-based Buffer Overflow Leading to Denial of Service in TP-Link Tapo C520WS
CVE-2026-34120 Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C520

IV. Related Vulnerabilities

Same product: Tapo C520WS v2.6
Same vendor: TP-Link Systems Inc.
Same weakness: CWE-122

V. Comments for CVE-2026-34119

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