A weakness has been identified in Tenda A21 1.0.0.0. This affects the function set_device_name of the file /goform/SetOnlineDevName. This manipulation of the argument devName causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 23 Feb 2026 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Tenda a21 Firmware
CPEs cpe:2.3:h:tenda:a21:-:*:*:*:*:*:*:*
cpe:2.3:o:tenda:a21_firmware:1.0.0.0:*:*:*:*:*:*:*
Vendors & Products Tenda a21 Firmware
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 23 Feb 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Tenda
Tenda a21
Vendors & Products Tenda
Tenda a21

Sat, 21 Feb 2026 21:15:00 +0000

Type Values Removed Values Added
Description A weakness has been identified in Tenda A21 1.0.0.0. This affects the function set_device_name of the file /goform/SetOnlineDevName. This manipulation of the argument devName causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks.
Title Tenda A21 SetOnlineDevName set_device_name stack-based overflow
Weaknesses CWE-119
CWE-121
References
Metrics cvssV2_0

{'score': 9, 'vector': 'AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 8.8, 'vector': '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'}

cvssV3_1

{'score': 8.8, 'vector': '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'}

cvssV4_0

{'score': 8.7, 'vector': '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-02-23T19:31:15.738Z

Reserved: 2026-02-20T17:04:45.674Z

Link: CVE-2026-2886

cve-icon Vulnrichment

Updated: 2026-02-23T19:31:09.469Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-21T21:16:11.217

Modified: 2026-02-23T21:00:35.513

Link: CVE-2026-2886

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-23T14:29:58Z

Weaknesses