CVE-2026-6241

Authenticated Format String Vulnerability in ONVIF AddScopes Method on TP-Link Tapo C520WS

MEDIUM
6.8
CVSS Score
Published: June 5, 2026 at 11:52 PM UTC
Updated: July 23, 2026 at 07:35 AM UTC
1 product affected across 1 vendorTapo C520WS

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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.2.6 Build 260528
Affected range stops below 1.2.6 Build 260528, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.8MEDIUMTPLink
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-134

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