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7.1
HIGH CVSS 4.0
CVE-2026-34124
Denial of Service via Path Expansion Overflow in HTTP Service in TP-Link Tapo C520WS
Overview
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.

Details
INFO

Published Date :

April 2, 2026, 6:16 p.m.

Last Modified :

April 6, 2026, 8:22 p.m.

Remotely Exploit :

No

Source :

f23511db-6c3e-4e32-a477-6aa17d310630
Impact
Affected Products

The following products are affected by CVE-2026-34124 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Tp-link tapo_c520ws_firmware
2 Tp-link tapo_c520ws
: Total Affected Vendor : 1 | Products : 2
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
CVSS 4.0 HIGH f23511db-6c3e-4e32-a477-6aa17d310630
CVSS 4.0 HIGH f23511db-6c3e-4e32-a477-6aa17d310630
Solution
Address HTTP request path parsing logic to prevent buffer overflows and memory corruption.
  • Update the device firmware to the latest version.
  • Avoid processing overly long HTTP request paths.
  • Implement robust path expansion validation.
  • Harden HTTP request handling code.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-34124.

URL Resource
https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes Release Notes
https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes Release Notes
https://www.tp-link.com/us/support/faq/5047/ Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-34124 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-34124 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog() CAPEC-92: Forced Integer Overflow Forced Integer Overflow CAPEC-100: Overflow Buffers Overflow Buffers

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-34124 vulnerability anywhere in the article.

  • CybersecurityNews
Multiple TP-Link Vulnerabilities Let Attackers Trigger DoS and Crash Routers

Multiple high-severity vulnerabilities exist in TP-Link’s Tapo C520WS smart security cameras. If exploited, these vulnerabilities may allow adjacent attackers to trigger Denial-of-Service (DoS) condit ... Read more

Published Date: Apr 03, 2026 (4 weeks ago)
  • Daily CyberSecurity
Smart Home Alert: Critical Flaws Exposed in TP-Link Tapo Security Cameras

A security advisory from TP-Link have exposured a series of high-severity vulnerabilities—ranging from CVE-2026-34118 to CVE-2026-34124—affecting the Tapo C520WS v2.6 outdoor security camera. With CVS ... Read more

Published Date: Apr 03, 2026 (4 weeks ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-34124 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Apr. 06, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CPE Configuration AND OR *cpe:2.3:o:tp-link:tapo_c520ws_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.2.4 OR cpe:2.3:h:tp-link:tapo_c520ws:2.6:*:*:*:*:*:*:*
    Added Reference Type TPLink: https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes Types: Release Notes
    Added Reference Type TPLink: https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes Types: Release Notes
    Added Reference Type TPLink: https://www.tp-link.com/us/support/faq/5047/ Types: Vendor Advisory
  • New CVE Received by f23511db-6c3e-4e32-a477-6aa17d310630

    Apr. 02, 2026

    Action Type Old Value New Value
    Added 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.
    Added CVSS V4.0 AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CWE CWE-120
    Added Reference https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes
    Added Reference https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes
    Added Reference https://www.tp-link.com/us/support/faq/5047/
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.1
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Base CVSS Score: 6.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact