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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.

在 Tapo C200 v5 的配置服务中，发现了一个在处理加密凭证数据时存在的不当输入验证漏洞。攻击者可以发送过大的加密密文值，由于输入验证不充分，可能触发异常处理失败，导致受影响设备崩溃或重启。 成功利用该漏洞可能会暂时中断 HTTPS 管理和监控功能，造成服务不可用（DoS），直到服务恢复为止。

CVSS 7.1 · High EPSS 0.19% · P9

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

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

V. Comments for CVE-2026-15316

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