CVE-2026-6241: CWE-134 Use of Externally-Controlled format string in TP-Link Systems Inc. Tapo C520WS v2
An authenticated format string vulnerability is present in the ONVIF AddScopes in Tapo C520WS v2, where user-controlled input is improperly passed to formatting functions without adequate sanitization. An attacker can inject format specifiers into ONVIF scope parameters to manipulate memory handling behavior. Successful exploitation may cause the ONVIF management service to crash, resulting in DoS condition that impacts normal device operation.
AI Analysis
Technical Summary
CVE-2026-6241 is a CWE-134 format string vulnerability affecting the ONVIF AddScopes feature in TP-Link Tapo C520WS v2. Authenticated users can inject format specifiers into ONVIF scope parameters, which are then passed unsafely to formatting functions without proper sanitization. This can manipulate memory handling and cause the ONVIF management service to crash, leading to denial of service. The vulnerability has a CVSS 4.0 base score of 6.8, indicating medium severity. No patch or official remediation guidance is currently available from the vendor.
Potential Impact
Successful exploitation results in a denial-of-service condition by crashing the ONVIF management service, which impacts the normal operation of the affected device. There is no indication of code execution or data disclosure from the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, limit access to the ONVIF management interface to trusted authenticated users only to reduce risk.
CVE-2026-6241: CWE-134 Use of Externally-Controlled format string in TP-Link Systems Inc. Tapo C520WS v2
Description
An authenticated format string vulnerability is present in the ONVIF AddScopes in Tapo C520WS v2, where user-controlled input is improperly passed to formatting functions without adequate sanitization. An attacker can inject format specifiers into ONVIF scope parameters to manipulate memory handling behavior. Successful exploitation may cause the ONVIF management service to crash, resulting in DoS condition that impacts normal device operation.
CVSS v4.0
Score 6.8medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-6241 is a CWE-134 format string vulnerability affecting the ONVIF AddScopes feature in TP-Link Tapo C520WS v2. Authenticated users can inject format specifiers into ONVIF scope parameters, which are then passed unsafely to formatting functions without proper sanitization. This can manipulate memory handling and cause the ONVIF management service to crash, leading to denial of service. The vulnerability has a CVSS 4.0 base score of 6.8, indicating medium severity. No patch or official remediation guidance is currently available from the vendor.
Potential Impact
Successful exploitation results in a denial-of-service condition by crashing the ONVIF management service, which impacts the normal operation of the affected device. There is no indication of code execution or data disclosure from the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, limit access to the ONVIF management interface to trusted authenticated users only to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TPLink
- Date Reserved
- 2026-04-13T17:10:26.104Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a23675be29bf47b50dbe8dd
Added to database: 06/06/2026, 00:18:35 UTC
Last enriched: 06/13/2026, 09:53:40 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 83
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