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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-34118

Heap-based Buffer Overflow Vulnerability Leading to Denial-of-Service in TP-Link Tapo C100, C101, C210 & C520WS

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Status
Published
Published
Updated
Assigning organization
TPLink

Description

A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C100/C101 v5, C210 v3.6 and 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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

TP-Link Systems Inc. Tapo C520WS v2.6

Default version status: unaffected

  • 0 to < 1.2.4 Build 260326 Rel.24666naffected

TP Link Systems Inc. Tapo C100 v5

Default version status: unaffected

  • 0 to < 1.5.4 Build 260528 Rel.11462naffected

TP Link Systems Inc. Tapo C101 v5

Default version status: unaffected

  • 0 to < 1.5.4 Build 260528 Rel.11462naffected

TP Link Systems Inc. Tapo C210 v3

Default version status: unaffected

  • 0 to < V3.6_1.2.7 Build 260818affected

References