CVE-2026-4490 Details
Description
A flaw has been found in Tenda A18 Pro 02.03.02.28. This issue affects the function setSchedWifi of the file /goform/openSchedWifi. This manipulation causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
A stack-based buffer overflow vulnerability has been identified in the Tenda A18 Pro router, specifically in the firmware version 02.03.02.28. The issue arises in the Wi-Fi scheduling configuration endpoint '/goform/openSchedWifi', within the 'setSchedWifi' function. This function processes user-controlled parameters 'schedStartTime' and 'schedEndTime' without proper length validation, allowing attackers to overflow a fixed-size heap-allocated buffer. This vulnerability could lead to memory corruption, causing a denial-of-service condition by crashing the device's management interface, or potentially allowing arbitrary code execution.
It is recommended to replace the unsafe 'strcpy' function with 'strncpy', ensuring that the length of the copied data does not exceed the buffer's capacity. Additionally, implement strict validation for the 'schedStartTime' and 'schedEndTime' parameters to ensure they conform to expected formats and lengths.
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 Mar 20, 2026CISA-ADP
Assessed Mar 20, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/lilukun337/cve/issues/2 | [email protected] | ExploitIssue TrackingTechnical Description |
| https://vuldb.com/?ctiid.352016 | [email protected] | Content WallTechnical Description |
| https://vuldb.com/?id.352016 | [email protected] | AdvisoryExploit |
| https://vuldb.com/?submit.773670 | [email protected] | Technical Description |
| https://www.tenda.com.cn/ | [email protected] | Vendor |
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 A18 Pro | All versions |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 20, 2026 | New CVE Received | [email protected] |