Unauthenticated Access to connectAP API Endpoint on Tapo C100, C200 & C425

published 2025-12-20 10 mo ago modified 2026-09-30 39 d ago also EUVD-2025-204619

cvss: 8.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits: 0; none known

The HTTPS service on Tapo C200 v3, v5, C425 v1.2 and C100 v5 exposes a connectAP interface without proper authentication. An unauthenticated attacker on the same local network segment can exploit this to modify the device’s Wi-Fi configuration, resulting in loss of connectivity and denial-of-service (DoS).

Patch / fix

fixed in 3 links 8

TP-Link Systems Inc. Tapo C200 V3_1.4.5 Build 251104, V5_1.4.6 Build 260709 Rel.27675n
TP Link Systems Inc. Tapo C100 v5 V5_1.4.4 Build 260303
TP Link Systems Inc. Tapo C425 v1.2 V1.20_1.2.27 Build 260518

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 10 mo ago (2025-12-22)

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	8.7	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA	4.0	8.7	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD	3.1	8.1	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

TP-Link Systems Inc. Tapo C200
TP Link Systems Inc. Tapo C100 v5
TP Link Systems Inc. Tapo C425 v1.2

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

Sources

CVE List CVE-2025-14300
NVD CVE-2025-14300

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary