A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the asynchronous parsing of local video stream content due to
insufficient alignment and validation of buffer boundaries when processing streaming inputs.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.

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Fixes

Solution

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Workaround

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History

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 within the asynchronous parsing of local video stream content due to insufficient alignment and validation of buffer boundaries when processing streaming inputs.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'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: TPLink

Published:

Updated: 2026-04-02T17:58:08.441Z

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

Link: CVE-2026-34120

cve-icon Vulnrichment

Updated: 2026-04-02T17:58:05.302Z

cve-icon NVD

Status : Received

Published: 2026-04-02T18:16:28.827

Modified: 2026-04-02T18:16:28.827

Link: CVE-2026-34120

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses