Description
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 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.
Published: 2026-04-02
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service (DoS) via heap overflow
Action: Apply patch
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 07 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
First Time appeared Tp-link tapo C520ws
Tp-link tapo C520ws Firmware
CPEs cpe:2.3:h:tp-link:tapo_c520ws:2.6:*:*:*:*:*:*:*
cpe:2.3:o:tp-link:tapo_c520ws_firmware:*:*:*:*:*:*:*:*
Vendors & Products Tp-link tapo C520ws
Tp-link tapo C520ws Firmware
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Fri, 03 Apr 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Tp-link
Tp-link tapo C520ws V2
Vendors & Products Tp-link
Tp-link tapo C520ws V2

Thu, 02 Apr 2026 20:30:00 +0000

Type Values Removed Values Added
Description 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 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.
Title Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C520WS
Weaknesses CWE-122
References
Metrics cvssV4_0

{'score': 7.1, 'vector': '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'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Tp-link Tapo C520ws Tapo C520ws Firmware Tapo C520ws V2
cve-icon MITRE

Status: PUBLISHED

Assigner: TPLink

Published:

Updated: 2026-04-02T17:48:43.255Z

Reserved: 2026-03-25T18:54:03.343Z

Link: CVE-2026-34118

cve-icon Vulnrichment

Updated: 2026-04-02T17:48:38.574Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-02T18:16:28.503

Modified: 2026-04-06T20:26:55.677

Link: CVE-2026-34118

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-07T07:55:51Z

Weaknesses