CVE-2026-5687 Details
Description
A weakness has been identified in Tenda CX12L 16.03.53.12. This issue affects the function fromNatStaticSetting of the file /goform/NatStaticSetting. This manipulation of the argument page causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks.
A stack-based buffer overflow vulnerability has been identified in the Tenda CX12L router running firmware version 16.03.53.12. The issue arises in the NatStaticSetting endpoint, specifically within the fromNatStaticSetting function. Here, the user-controlled page parameter is processed using sprintf, which writes data into a fixed-size buffer without proper length checks. This oversight allows input larger than 256 bytes to overwrite adjacent memory, potentially leading to application crashes, memory corruption, or arbitrary code execution. The vulnerability can be exploited remotely, posing significant risks to the device's stability, data confidentiality, and overall security.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 7, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/cve-a/lvdan/issues/5 | [email protected] | ExploitIssue TrackingMitigationThird Party Advisory |
| https://vuldb.com/submit/792785 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/355514 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/355514/cti | [email protected] | Permissions RequiredVDB Entry |
| https://www.tenda.com.cn/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| tenda cx12l firmware | 16.03.53.12 |
CPE
Remediation
| |
| tenda cx12l | All versions |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Initial Analysis | [email protected] |
| Apr 6, 2026 | New CVE Received | [email protected] |