CVE-2026-4565

Tenda AC21 SetNetControlList formSetQosBand buffer overflow

State: Published
Severity: 8.7 High
Published: Mar 23, 2026
Updated: Mar 23, 2026
Reserved: Mar 22, 2026

Description

A vulnerability was detected in Tenda AC21 16.03.08.16. Impacted is the function formSetQosBand of the file /goform/SetNetControlList. Performing a manipulation of the argument list results in buffer overflow. The attack can be initiated remotely. The exploit is now public and may be used.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P	VulDB
3.1	8.8 High	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	VulDB
3.0	8.8 High	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R	VulDB
2.0	9.0 High	AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR	VulDB

Weaknesses

CWE-120 Buffer Overflow
CWE-119 Memory Corruption

Affected Products

Product	Versions
AC21Tenda	16.03.08.16Affected

References

VDB-352402 | Tenda AC21 SetNetControlList formSetQosBand buffer overflowvdb-entrytechnical-description
VDB-352402 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #775119 | Tenda AC21 Tenda AC21 V1.0 V16.03.08.16 Buffer Overflowthird-party-advisory
https://github.com/hellonestor/killallbug/issues/14issue-tracking
https://github.com/hellonestor/killallbug/releases/tag/pocexploitpatch
https://www.tenda.com.cn/product

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