CVE-2026-51600: n/a
Tenda CP3 V3.0 firmware V31.1.9.91 does not validate the Content-Length header field in RTSP requests (including DESCRIBE, SETUP, and PLAY methods). When a request carrying a Content-Length header is received without a corresponding message body, the RTSP parser enters a persistent body-awaiting state, causing the affected TCP connection to become permanently non-functional. The device does not actively close the connection, resulting in a TCP resource leak. This issue can be exploited by an unauthenticated remote attacker to cause a denial-of-service condition.
AI Analysis
Technical Summary
The vulnerability in Tenda CP3 V3.0 firmware 31.1.9.91 involves improper validation of the Content-Length header in RTSP requests (DESCRIBE, SETUP, PLAY). When a request with a Content-Length header but no body is received, the RTSP parser enters a persistent state awaiting the body, causing the affected TCP connection to hang indefinitely. The device fails to close these connections, resulting in TCP resource exhaustion. This can be exploited remotely without authentication to cause a denial-of-service condition by depleting available TCP connections.
Potential Impact
An unauthenticated remote attacker can exploit this vulnerability to cause a denial-of-service condition by sending specially crafted RTSP requests that cause the device to hold TCP connections indefinitely. This leads to TCP resource leaks, potentially rendering the device unable to accept new connections and disrupting normal operation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, network-level protections such as limiting exposure of the RTSP service to untrusted networks or applying rate limiting on RTSP requests may help mitigate exploitation risk.
CVE-2026-51600: n/a
Description
Tenda CP3 V3.0 firmware V31.1.9.91 does not validate the Content-Length header field in RTSP requests (including DESCRIBE, SETUP, and PLAY methods). When a request carrying a Content-Length header is received without a corresponding message body, the RTSP parser enters a persistent body-awaiting state, causing the affected TCP connection to become permanently non-functional. The device does not actively close the connection, resulting in a TCP resource leak. This issue can be exploited by an unauthenticated remote attacker to cause a denial-of-service condition.
CVSS v3.1
Score 7.5high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Tenda CP3 V3.0 firmware 31.1.9.91 involves improper validation of the Content-Length header in RTSP requests (DESCRIBE, SETUP, PLAY). When a request with a Content-Length header but no body is received, the RTSP parser enters a persistent state awaiting the body, causing the affected TCP connection to hang indefinitely. The device fails to close these connections, resulting in TCP resource exhaustion. This can be exploited remotely without authentication to cause a denial-of-service condition by depleting available TCP connections.
Potential Impact
An unauthenticated remote attacker can exploit this vulnerability to cause a denial-of-service condition by sending specially crafted RTSP requests that cause the device to hold TCP connections indefinitely. This leads to TCP resource leaks, potentially rendering the device unable to accept new connections and disrupting normal operation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, network-level protections such as limiting exposure of the RTSP service to untrusted networks or applying rate limiting on RTSP requests may help mitigate exploitation risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-08T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4fd7da68715ace43c44416
Added to database: 07/09/2026, 17:18:18 UTC
Last enriched: 07/09/2026, 17:32:45 UTC
Last updated: 07/09/2026, 18:03:07 UTC
Views: 5
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