CVE-2026-6240

Summary

A stack-based buffer overflow vulnerability exists in Tapo C520WS v2 in the ONVIF DeleteUsers service, due to insufficient boundary checks when handling multiple user deletion parameters. An authenticated attacker can send a crafted malicious request containing an excessive number of identifiers to overflow stack memory.

Successful exploitation may result in a service crash or deadlock, leading to DoS affecting device management and monitoring functionality.

Affected Software

VendorProductVersion RangeStatus
TP-Link Systems Inc.Tapo C520WS v20 < 1.2.6 Build 260528affected

Weaknesses

  • CWE-121: CWE-121 Stack-based buffer overflow

ADP Enrichment

CISA ADP Vulnrichment

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

References