CVE-2026-1638: medium-severity vulnerability in Tenda AC21
Tenda AC21 mDMZSetCfg command injection
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 2.2%
A security flaw has been discovered in Tenda AC21 1.1.1.1/1.dmzip/16.03.08.16. The impacted element is the function mDMZSetCfg of the file /goform/mDMZSetCfg. The manipulation of the argument dmzIp results in command injection. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
Tenda · AC21Related CVEs — Tenda AC21
In the same product, most dangerous first.
CVE-2025-9605CRITICALTenda AC21/AC23 GetParentControlInfo stack-based overflowEPSS 6.0%CVE-2025-13446HIGHTenda AC21 SetSysTimeCfg stack-based overflowEPSS 4.2%CVE-2025-13445HIGHTenda AC21 SetIpMacBind stack-based overflowEPSS 4.2%CVE-2025-10838HIGHTenda AC21 WifiExtraSet sub_45BB10 buffer overflowEPSS 1.1%CVE-2026-4565HIGHTenda AC21 SetNetControlList formSetQosBand buffer overflowEPSS 1.0%CVE-2025-11091HIGHTenda AC21 SetStaticRouteCfg sscanf buffer overflowEPSS 0.8%