CVE-2026-15316

Denial-of-Service via Oversized Encrypted Credential Input in TP-Link Tapo C200

Published Aug 18, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Tp-link tapo C200
Tp-link tapo C200 Firmware
CPEs cpe:2.3:h:tp-link:tapo_c200:5.0:*:*:*:*:*:*:*
cpe:2.3:o:tp-link:tapo_c200_firmware:*:*:*:*:*:*:*:*
Vendors & Products Tp-link tapo C200
Tp-link tapo C200 Firmware
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Type Values Removed Values Added
First Time appeared Tp-link
Tp-link tapo C200 V5
Vendors & Products Tp-link
Tp-link tapo C200 V5
Type Values Removed Values Added
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.
Title Denial-of-Service via Oversized Encrypted Credential Input in TP-Link Tapo C200
Weaknesses CWE-20
References
Metrics cvssV4_0

{'score': 7.1, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
TPLink
Published
Updated
Aug 20, 2026, 3:36 PM
Reserved
Jul 9, 2026, 5:55 PM
Status
Analyzed
Published
Aug 18, 2026, 10:16 PM
Modified
Oct 22, 2026, 5:09 PM