TI-2021-19537 Aliases CVE-2021-43711 GHSA-chwf-9c6x-wv85

The downloadFlile.cgi binary file in TOTOLINK EX200 V4.0.3c.7646_B20201211 has a command…

HIGH 69CWE-77Published 2022-01-04 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
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 · NVD. Fix status from CNA. Impact type from CWE-77.

Summary

The downloadFlile.cgi binary file in TOTOLINK EX200 V4.0.3c.7646_B20201211 has a command injection vulnerability when receiving GET parameters. The parameter name can be constructed for unauthenticated command execution.

Why it matters now

EPSS 0.37835 98th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:totolink:ex200_firmware:4.0.3c.7646_b20201211:::::::*	4.0.3c.7646_b20201211	Vulnerable	TOTOLINK
cpe:2.3:h:totolink:ex200:-:::::::*	not specified by NVD	Running on	TOTOLINK

cpe:2.3:o:totolink:ex200_firmware:4.0.3c.7646_b20201211:*:*:*:*:*:*:* Versions 4.0.3c.7646_b20201211 Vulnerable ·TOTOLINK
cpe:2.3:h:totolink:ex200:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-43711
2026-10-03 Alias added: GHSA-chwf-9c6x-wv85

References

Exploit 1

https://github.com/doudoudedi/ToTolink_EX200_Cmmand_Execute/blob/main/ToTolink%20EX200%20Comand%20Injection2.md

TI-2024-20942 TOTOLINK EX200 V4.0.3c.7646_B20201211 was discovered to contain a hardcoded password for root at /etc/shadow.sample. CVSS 3.1CRITICAL 9.8
TI-2024-20939 TOTOLINK EX200 V4.0.3c.7646_B20201211 was discovered to contain a remote code execution… CVSS 3.1CRITICAL 9.8
TI-2024-20946 TOTOLINK EX200 V4.0.3c.7646_B20201211 allows attackers to bypass login through the Form_Login function. CVSS 3.1HIGH 8.8
TI-2024-20940 TOTOLINK EX200 V4.0.3c.7646_B20201211 was discovered to contain a remote code execution… CVSS 3.1HIGH 8.8
TI-2024-20941 TOTOLINK EX200 V4.0.3c.7646_B20201211 was discovered to contain a remote code execution… CVSS 3.1HIGH 8.8
TI-2024-06797 TOTOLINK EX200 cstecgi.cgi loginauth buffer overflow CVSS 4.0HIGH 8.7

See all 18 →

Sources

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