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CVE-2026-15316— Denial-of-Service via Oversized Encrypted Credential Input in TP-Link Tapo C200

Quick assessment

Affected
TP-Link Systems Inc. Tapo C200 v5
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TP-Link Tapo C200是中国TP-Link公司的一款智能摄像头。 TP-Link Tapo C200 V5_1.4.6 Build 260709 Rel.27675n之前版本存在输入验证错误漏洞，该漏洞源于配置服务处理加密凭据数据时输入验证不当，攻击者可发送过大的加密密文值触发异常处理失败，导致设备崩溃或重启，造成拒绝服务。

CVSS 7.1 · High EPSS 0.33% · P27

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood

Affected Version Matrix 1

VendorProduct Version RangeStatus
TP-Link Systems Inc. Tapo C200 v5 < V5_1.4.6 Build 260709 Rel.27675n affected
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I. Basic Information for CVE-2026-15316

Vulnerability Information
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Vulnerability Title
Denial-of-Service via Oversized Encrypted Credential Input in TP-Link Tapo C200
Source: CVE Program / CVE List V5
Vulnerability Description
An improper input validation vulnerability in the configuration service for processing encrypted credential data has been identified in Tapo C200 v5.  An attacker can send oversized crypted ciphertext values that may trigger exception handling failures, due to insufficient validation, causing the affected device to crash or restart. Successful exploitation may temporarily disrupt HTTPS management and monitoring functionality, resulting in a denial-of-service (DoS) condition until the service recovers.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
TP-Link Tapo C200 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TP-Link Tapo C200是中国TP-Link公司的一款智能摄像头。 TP-Link Tapo C200 V5_1.4.6 Build 260709 Rel.27675n之前版本存在输入验证错误漏洞，该漏洞源于配置服务处理加密凭据数据时输入验证不当，攻击者可发送过大的加密密文值触发异常处理失败，导致设备崩溃或重启，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TP-Link Systems Inc. Tapo C200 v5 0 ~ V5_1.4.6 Build 260709 Rel.27675n -

II. Public POCs for CVE-2026-15316

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III. Intelligence Information for CVE-2026-15316

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Vendor Advisories for CVE-2026-15316 (1)

Vendor Pages for CVE-2026-15316 (2)

IV. Related Vulnerabilities

Same product: Tapo C200 v5
Same vendor: TP-Link Systems Inc.
Same weakness: CWE-20