CVE-2026-2870

HIGH 8.8

Tenda A21 formSetQosBand set_qosMib_list stack-based overflow

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121 CWE-119
Vendor	tenda
Product	a21
Published	Feb 21, 2026
Last Updated	Feb 23, 2026

Stay Ahead of the Next One

Get instant alerts for tenda a21

Be the first to know when new high vulnerabilities affecting tenda a21 are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Tenda / A21

1.0.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 hhsw34 (VulDB User)