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TI-2026-02467 Aliases CVE-2026-2872GHSA-2j3g-5jhm-r285

Tenda A21 MAC Filtering Configuration Endpoint setBlackRule set_device_name stack-based overflow

Priority HIGH 73CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

A security vulnerability has been detected in Tenda A21 1.0.0.0. This vulnerability affects the function set_device_name of the file /goform/setBlackRule of the component MAC Filtering Configuration Endpoint. Such manipulation of the argument devName/mac leads to stack-based buffer overflow. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00646 51st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TendaA211.0.0.0—No fix listedCNA
  • A21 VendorTenda Affected 1.0.0.0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:tenda:a21_firmware:1.0.0.0:*:*:*:*:*:*:*1.0.0.0VulnerableTenda
cpe:2.3:h:tenda:a21:-:*:*:*:*:*:*:*not specified by NVDRunning onTenda
  • cpe:2.3:o:tenda:a21_firmware:1.0.0.0:*:*:*:*:*:*:* Versions 1.0.0.0 Vulnerable ·Tenda
  • cpe:2.3:h:tenda:a21:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Tenda

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-2872
  2. 2026-10-03 Alias added: GHSA-2j3g-5jhm-r285

References

Exploit 1

Other 1

  • TI-2026-02480 Tenda A21 SetOnlineDevName set_device_name stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2026-02469 Tenda A21 fast_setting_wifi_set form_fast_setting_wifi_set stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2026-02468 Tenda A21 openSchedWifi setSchedWifi stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2026-02466 Tenda A21 SetIpMacBind fromSetIpMacBind stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2026-02465 Tenda A21 formSetQosBand set_qosMib_list stack-based overflow CVSS 4.0HIGH 8.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences