CVE-2026-2870: Tenda A21 formSetQosBand set_qosMib_list stack-based overflow

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-02-21 · updated 2026-06-17
Weakness: CWE-119

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.

Affected products

Tenda A21: 1.0.0.0

References

https://github.com/QIU-DIE/cve-nneeww/issues/1
https://vuldb.com/?ctiid.347107
https://vuldb.com/?id.347107
https://vuldb.com/?submit.754627
https://www.tenda.com.cn/

Get alerted when CVE-2026-2870 or the next vulnerability affects your stack