CVE-2026-1637

HIGH 8.8

Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.

CWE	CWE-121 CWE-119
Vendor	tenda
Product	ac21
Published	Jan 29, 2026
Last Updated	Feb 23, 2026

Stay Ahead of the Next One

Get instant alerts for tenda ac21

Be the first to know when new high vulnerabilities affecting tenda ac21 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 / AC21

16.03.08.16

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/?id.343416 vuldb.com: https://vuldb.com/?ctiid.343416 vuldb.com: https://vuldb.com/?submit.740865 github.com: https://github.com/LX-LX88/cve/issues/25 tenda.com.cn: https://www.tenda.com.cn/

Credits

🔍 LX-LX (VulDB User)