CVE-2026-2886
High
Description
A weakness has been identified in Tenda A21 1.0.0.0. This affects the function set_device_name of the file /goform/SetOnlineDevName. This manipulation of the argument devName causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks.
SeverityHigh
CVSS8.8
Exploit probability—
ProductTenda A21 Firmware
PublishedFeb 21, 2026
First seenFeb 21, 2026
Weakness typeCWE-121CWE-121CWE-119Memory buffer bounds error
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| tenda a21_firmware | 1.0.0.0 | — |
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