CVE-2026-51602 Details
Description
A stack-based buffer overflow vulnerability in the RTSP service of Tenda CP3 V3.0 (firmware V31.1.9.91) allows an unauthenticated remote attacker to cause a denial of service via a crafted SETUP request. The RTSP service's second-stage URL routing parser fails to validate the length of the URL field in the first SETUP request. By supplying a URL consisting of exactly four consecutive repetitions of a valid RTSP URL, an attacker can bypass first-stage format validation and trigger a stack buffer overflow, causing an immediate crash of the RTSP service process and rendering the device inaccessible to all clients on the local network.
A stack-based buffer overflow vulnerability has been identified in the RTSP service of the Tenda CP3 V3.0 IP camera, specifically in firmware version V31.1.9.91. This vulnerability allows an unauthenticated remote attacker to cause a denial-of-service by sending a crafted SETUP request. The issue arises because the RTSP service's second-stage URL routing parser fails to properly validate the length of the URL field in the initial SETUP request. By using a URL that consists of four consecutive repetitions of a valid RTSP URL, an attacker can bypass the first-stage format validation and trigger a stack buffer overflow. This overflow causes an immediate crash of the RTSP service process, making the device inaccessible to all clients on the local network.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 9, 2026CISA-ADP
Assessed Jul 9, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/kkkk2222874/cve_ID_report/blob/main/Tenda_CP3_V3.0/Tenda_CP3_V3.0_3th/README.md | CISA-ADP | ExploitTechnical Description |
| https://github.com/kkkk2222874/cve_ID_report/blob/main/Tenda_CP3_V3.0/Tenda_CP3_V3.0_3th/README.md | [email protected] | ExploitTechnical Description |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-121 | Stack-based Buffer Overflow | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Tenda CP3 | V31.1.9.91 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 9, 2026 | CVE Modified | CISA-ADP |
| Jul 9, 2026 | New CVE Received | [email protected] |