CVE-2026-4565

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-4565
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.

8.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.0 /10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:L/Au:S/C:C/I:C/A:C

Exploitability : 8.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References
Link Resource
https://github.com/hellonestor/killallbug/issues/14 Exploit Issue Tracking
https://github.com/hellonestor/killallbug/releases/tag/poc Exploit
https://vuldb.com/?ctiid.352402 Permissions Required VDB Entry
https://vuldb.com/?id.352402 Third Party Advisory VDB Entry
https://vuldb.com/?submit.775119 Third Party Advisory VDB Entry
https://www.tenda.com.cn/ Product
Configurations

Configuration 1 (hide)

AND
cpe:2.3:o:tenda:ac21_firmware:16.03.08.16:*:*:*:*:*:*:*
cpe:2.3:h:tenda:ac21:1.0:*:*:*:*:*:*:*
History

03 Apr 2026, 11:31

Type Values Removed Values Added
First Time Tenda
Tenda ac21
Tenda ac21 Firmware
CPE cpe:2.3:o:tenda:ac21_firmware:16.03.08.16:*:*:*:*:*:*:*
cpe:2.3:h:tenda:ac21:1.0:*:*:*:*:*:*:*
Summary
  • (es) Una vulnerabilidad fue detectada en Tenda AC21 16.03.08.16. Afectada es la función formSetQosBand del archivo /goform/SetNetControlList. Realizar una manipulación del argumento list resulta en desbordamiento de búfer. El ataque puede ser iniciado remotamente. El exploit es ahora público y puede ser usado.
References () https://github.com/hellonestor/killallbug/issues/14 - () https://github.com/hellonestor/killallbug/issues/14 - Exploit, Issue Tracking
References () https://github.com/hellonestor/killallbug/releases/tag/poc - () https://github.com/hellonestor/killallbug/releases/tag/poc - Exploit
References () https://vuldb.com/?ctiid.352402 - () https://vuldb.com/?ctiid.352402 - Permissions Required, VDB Entry
References () https://vuldb.com/?id.352402 - () https://vuldb.com/?id.352402 - Third Party Advisory, VDB Entry
References () https://vuldb.com/?submit.775119 - () https://vuldb.com/?submit.775119 - Third Party Advisory, VDB Entry
References () https://www.tenda.com.cn/ - () https://www.tenda.com.cn/ - Product

23 Mar 2026, 01:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-23 01:16

Updated : 2026-04-03 11:31

NVD link : CVE-2026-4565

Mitre link : CVE-2026-4565

CVE.ORG link : CVE-2026-4565

JSON object : View

Products Affected

tenda

  • ac21_firmware
  • ac21
CWE
CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')