TI-2024-03954 Aliases CVE-2024-4249 GHSA-2p5q-v3v6-46h5

Tenda i21 wifiSSIDget formwrlSSIDget stack-based overflow

HIGH 73CWE-121Published 2024-04-27 · Updated 2024-08-01

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

A vulnerability was found in Tenda i21 1.0.0.14(4656). It has been classified as critical. Affected is the function formwrlSSIDget of the file /goform/wifiSSIDget. The manipulation of the argument ssidIndex leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-262140. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01349 71st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

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

Vendor	Product	Affected versions	Fixed in	Status	Source
Tenda	i21	1.0.0.14(4656)	—	No fix listed	CNA

i21 VendorTenda Affected 1.0.0.14(4656) Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:tenda:i21_firmware:1.0.0.14\(4656\):::::::*	1.0.0.14(4656)	Vulnerable	Tenda
cpe:2.3:h:tenda:i21:-:::::::*	not specified by NVD	Running on	Tenda

cpe:2.3:o:tenda:i21_firmware:1.0.0.14\(4656\):*:*:*:*:*:*:* Versions 1.0.0.14(4656) Vulnerable ·Tenda
cpe:2.3:h:tenda:i21:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Tenda

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2024-4249
2026-10-03 Alias added: GHSA-2p5q-v3v6-46h5

References

Exploit 1

https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/i/i21/formwrlSSIDget.md

TI-2022-21794 Tenda i21 V1.0.0.14(4656) is vulnerable to Buffer Overflow via /goform/setDiagnoseInfo. CVSS 3.1CRITICAL 9.8
TI-2022-21793 Tenda i21 V1.0.0.14(4656) has a stack overflow vulnerability via /goform/setSysPwd. CVSS 3.1CRITICAL 9.8
TI-2022-21792 Tenda i21 V1.0.0.14(4656) is vulnerable to Buffer Overflow via /goform/setSnmpInfo. CVSS 3.1CRITICAL 9.8
TI-2022-21795 Tenda i21 V1.0.0.14(4656) is vulnerable to Buffer Overflow via /goform/setUplinkInfo. CVSS 3.1CRITICAL 9.8
TI-2022-21791 Tenda i21 V1.0.0.14(4656) is vulnerable to Buffer Overflow via /goform/AddSysLogRule. CVSS 3.1CRITICAL 9.8
TI-2024-04184 Tenda i21 formexeCommand stack-based overflow CVSS 3.1HIGH 8.8

See all 18 →

Sources

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