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Vulnerability record · CVE-2026-15315 · published 18 August 2026

CVE-2026-15315: Tp-link tapo c120 firmware improper authentication vulnerability

Tp Link · Tapo C120 Firmware

Tapo C120 v1 and C200 v5 contain an improper authentication vulnerability within the login authentication verification module. An attacker on the local network can exploit weaknesses in challenge parameter validation to bypass normal authentication controls and obtain administrative session tokens. Successful exploitation may allow an attacker to subsequently execute privileged management actions, enable unauthorized administrative access and temporary disruption of device services, resulting in a denial-of-service (DoS) condition.

8.7 CVSS 4.0 High EPSS 0.30% · top 79.2% CWE-287 · Improper authentication
8.7CVSS 4.0 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
5References
4 Sep 2026Last modified by NVD

Description

Tapo C120 v1 and C200 v5 contain an improper authentication vulnerability within the login authentication verification module. An attacker on the local network can exploit weaknesses in challenge parameter validation to bypass normal authentication controls and obtain administrative session tokens. Successful exploitation may allow an attacker to subsequently execute privileged management actions, enable unauthorized administrative access and temporary disruption of device services, resulting in a denial-of-service (DoS) condition.

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:

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.tp-link.com/en/support/download/tapo-c120/v1.26/#Firmware-Release-Notes Release NotesProduct
https://www.tp-link.com/en/support/download/tapo-c200/v5/ ProductRelease Notes
https://www.tp-link.com/us/support/download/tapo-c120/v1.26/#Firmware-Release-Notes Release NotesProduct
https://www.tp-link.com/us/support/download/tapo-c200/v5/ ProductRelease Notes
https://www.tp-link.com/us/support/faq/5248/ Vendor AdvisoryPatch

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-4045TP-Link Tapo C200 camera command injection in uhttpd allows unauthenticated RCEThe TP-Link Tapo C200 IP camera, firmware 1.1.15 and below, contains a command injection flaw (CWE-77) in the uhttpd binary, which runs as root by de…EPSS 72%analysed8.7CVE-2025-8065Tp-link tapo c200 firmware stack-based buffer overflow vulnerabilityA stack-based buffer overflow vulnerability was identified in the ONVIF SOAP XML Parser in Tapo C200 v3 and C520WS v2.6. When processing XML tags wit…EPSS 0.53%8.7CVE-2025-14300Tp-link tapo c200 firmware missing authentication for critical function vulnerabilityThe HTTPS service on Tapo C200 v3, v5, C425 v1.2 and C100 v5  exposes a connectAP interface without proper authentication. An unauthenticated attacke…EPSS 0.37%7.1CVE-2026-15316Tp-link tapo c200 firmware improper input validation vulnerabilityAn improper input validation vulnerability in the configuration service for processing encrypted credential data has been identified in Tapo C200 v5.…EPSS 0.24%7.1CVE-2026-12760Tp-link tapo c200 firmware allocation without limits vulnerabilityA denial-of-service (DoS) vulnerability has been identified in Tapo C200 v3 in the network packet handling logic due to improper handling of IPv4 fra…EPSS 0.36%7.1CVE-2026-1871Tp-link tapo c200 firmware stack-based buffer overflow vulnerabilityTP-Link Tapo C200 v5 contains a stack-based buffer overflow flaw in RTSP authentication handling due to improper validation of Authorization header f…EPSS 0.31%7.1CVE-2025-14299Tp-link tapo c200 firmware allocation without limits vulnerabilityThe HTTPS server on Tapo C200 V3 does not properly validate the Content-Length header, which can lead to an integer overflow. An unauthenticated atta…EPSS 0.24%5.3CVE-2020-11445Tp-link nc450 firmware vulnerabilityTP-Link cloud cameras through 2020-02-09 allow remote attackers to bypass authentication and obtain sensitive information via vectors involving a Wi-…EPSS 1.8%

Source: NIST National Vulnerability Database (record CVE-2026-15315), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.