CVE-2026-51606

Published Jul 9, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
An improper input handling vulnerability in the RTSP service of Tenda CP3 V3.0 (firmware V31.1.9.91) causes the device to abruptly terminate the TCP connection with a RST packet when a request containing an oversized field value is received, without returning any RFC 2326-compliant error response. This behavior affects the request-line URL field and header field values across multiple RTSP request types.

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
Title RTSP Input Validation Failure Causes TCP Reset Leading to Denial of Service on Tenda CP3
Type Values Removed Values Added
Title RTSP Input Validation Failure Causes TCP Reset Leading to Denial of Service on Tenda CP3
Type Values Removed Values Added
Title RTSP Service Denial of Service via Oversized Field Input on Tenda CP3 Router
Type Values Removed Values Added
Title RTSP Service Denial of Service via Oversized Field Input on Tenda CP3 Router
Type Values Removed Values Added
Title RTSP Input Validation Failure Causing Connection Reset on Tenda CP3
Type Values Removed Values Added
Title RTSP Input Validation Failure Causing Connection Reset on Tenda CP3
Type Values Removed Values Added
First Time appeared Tenda
Tenda cp3
Vendors & Products Tenda
Tenda cp3
Type Values Removed Values Added
Weaknesses CWE-20
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An improper input handling vulnerability in the RTSP service of Tenda CP3 V3.0 (firmware V31.1.9.91) causes the device to abruptly terminate the TCP connection with a RST packet when a request containing an oversized field value is received, without returning any RFC 2326-compliant error response. This behavior affects the request-line URL field and header field values across multiple RTSP request types.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Jul 9, 2026, 5:53 PM
Reserved
Jun 8, 2026, 12:00 AM
Status
Deferred
Published
Jul 9, 2026, 5:17 PM
Modified
Oct 25, 2026, 5:10 PM