CVE-2026-34118

Summary

A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C100/C101 v5, 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 Software

VendorProductVersion RangeStatus
TP-Link Systems Inc.Tapo C520WS v2.60 < 1.2.4 Build 260326 Rel.24666naffected
TP Link Systems Inc.Tapo C100 v50 < 1.5.4 Build 260528 Rel.11462naffected
TP Link Systems Inc.Tapo C101 v50 < 1.5.4 Build 260528 Rel.11462naffected

Weaknesses

  • CWE-122: CWE-122 Heap-based buffer overflow

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References