CVE-2026-2874 Details
Description
A flaw has been found in Tenda A21 1.0.0.0. Impacted is the function form_fast_setting_wifi_set of the file /goform/fast_setting_wifi_set. Executing a manipulation of the argument ssid can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.
A stack-based buffer overflow vulnerability has been identified in the Tenda A21 router, specifically in the firmware version 1.0.0.0. The issue arises in the Wi-Fi configuration function 'form_fast_setting_wifi_set' within the '/goform/fast_setting_wifi_set' file. The vulnerability allows remote attackers to manipulate the 'ssid' parameter, leading to potential arbitrary code execution with root privileges or causing a denial-of-service condition by crashing the device's management interface.
Users are advised to update to a version of the firmware that addresses this vulnerability. If no such version is available, consider replacing the device with a more secure alternative.
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 Feb 23, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/QIU-DIE/cve-nneeww/issues/5 | [email protected] | ExploitIssue TrackingMitigationThird Party Advisory |
| https://vuldb.com/?ctiid.347111 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.347111 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.754636 | [email protected] | Third Party AdvisoryVDB 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 a21 firmware | 1.0.0.0 |
CPE
Remediation
| |
| tenda a21 | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 23, 2026 | Initial Analysis | [email protected] |
| Feb 21, 2026 | New CVE Received | [email protected] |