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CVE-2026-34118

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 1.2.4 Build 260326 Rel.24666n, 1.5.4 Build 260528 Rel.11462n, V3.6_1.2.7 Build 260818
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • TP-Link Systems Inc. Tapo C520WS v2.6

    fixed in 1.2.4 Build 260326 Rel.24666n

  • TP Link Systems Inc. Tapo C100 v5

    fixed in 1.5.4 Build 260528 Rel.11462n

  • TP Link Systems Inc. Tapo C101 v5

    fixed in 1.5.4 Build 260528 Rel.11462n

  • TP Link Systems Inc. Tapo C210 v3

    fixed in V3.6_1.2.7 Build 260818

References 7

tp-link.com