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TI-2026-02465 Aliases CVE-2026-2870GHSA-wpqj-9q8f-r6hc

Tenda A21 formSetQosBand set_qosMib_list 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 flaw has been discovered in Tenda A21 1.0.0.0. Affected by this issue is the function set_qosMib_list of the file /goform/formSetQosBand. The manipulation of the argument list results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00669 52nd 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-2026-2870
  2. 2026-10-03 Alias added: GHSA-wpqj-9q8f-r6hc

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-2026-02467 Tenda A21 MAC Filtering Configuration Endpoint setBlackRule set_device_name stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2026-02466 Tenda A21 SetIpMacBind fromSetIpMacBind 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