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CVE-2026-34124— Denial of Service via Path Expansion Overflow in HTTP 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请求路径解析逻辑未考虑规范化期间的路径扩展，可能导致缓冲区溢出和内存损坏，进而引发拒绝服务攻击。

AI Predicted 7.5 Difficulty: Easy EPSS 0.30% · P22 Updated Apr 03, 2026

Possible ATT&CK Techniques 2 AI

T1190 · Exploit Public-Facing Application T1499 · Endpoint Denial of Service

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I. Basic Information for CVE-2026-34124

Vulnerability Information

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Vulnerability Title

Denial of Service via Path Expansion Overflow in HTTP Service in TP-Link Tapo C520WS

Source: CVE Program / CVE List V5

Vulnerability Description

A denial-of-service vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP request path parsing logic. The implementation enforces length restrictions on the raw request path but does not account for path expansion performed during normalization. An attacker on the adjacent network may send a crafted HTTP request to cause buffer overflow and memory corruption, leading to system interruption or device reboot.

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

未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)

Source: CVE Program / CVE List V5

Vulnerability Title

TP-Link Tapo C520WS 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

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-2026-34124

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-34124

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Vendor Advisories for CVE-2026-34124 (1)

🔗 Security Advisory on Multiple Vulnerabilities on TP-Link Tapo C520WS (CVE-2026-34118 to CVE-2026-34122, CVE-2026-34124) Read full article vendor-advisory

https://www.cve.org/CVERecord?id=CVE-2026-34124

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-2026-34119		Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C520
CVE-2026-34121		Authentication Bypass in DS Configuration Service via HTTP Request Parsing Differential of
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-120