A weakness has been identified in Tenda A21 1.0.0.0. This affects the function fromSetIpMacBind of the file /goform/SetIpMacBind. This manipulation of the argument list causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

Exploitation poc

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Tenda
  • A21
  • A21 Firmware

Configuration 1 [-]

AND
cpe:2.3:o:tenda:a21_firmware:1.0.0.0:*:*:*:*:*:*:*
cpe:2.3:h:tenda:a21:-:*:*:*:*:*:*:*

No data.

References
Link Providers
https://github.com/QIU-DIE/cve-nneeww/issues/2 cve-icon cve-icon
https://vuldb.com/?ctiid.347108 cve-icon cve-icon
https://vuldb.com/?id.347108 cve-icon cve-icon
https://vuldb.com/?submit.754630 cve-icon cve-icon
https://vuldb.com/?submit.754631 cve-icon cve-icon
https://www.tenda.com.cn/ cve-icon cve-icon
History

Mon, 23 Feb 2026 21:00:00 +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

Mon, 23 Feb 2026 20:15:00 +0000

Type Values Removed Values Added
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 15:45:00 +0000

Type Values Removed Values Added
Description A weakness has been identified in Tenda A21 1.0.0.0. This affects the function fromSetIpMacBind of the file /goform/SetIpMacBind. This manipulation of the argument list causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.
Title Tenda A21 SetIpMacBind fromSetIpMacBind 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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-02-21T15:32:09.853Z

Updated: 2026-02-23T19:38:22.083Z

Reserved: 2026-02-20T14:40:42.148Z

Link: CVE-2026-2871

cve-icon Vulnrichment

Updated: 2026-02-23T19:38:15.304Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-21T16:16:05.133

Modified: 2026-02-23T20:59:13.240

Link: CVE-2026-2871

cve-icon Redhat

No data.