CVE-2026-2870
High
Description
A security flaw has been discovered in Tenda A21 1.0.0.0. Affected by this issue is the function set_qosMib_list of the file /goform/formSetQosBand. The manipulation of the argument list results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been released to the public and may 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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