Cyber Resilience

CVE-2021-43711

CriticalPublic PoCRCE

Published: 04 January 2022

Published
04 January 2022
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.2484 96.3th percentile
Risk Priority 35 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-43711 is a critical-severity Command Injection (CWE-77) vulnerability in Totolink Ex200 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 3.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-77

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

totolink
ex200 firmware
4.0.3c.7646_b20201211

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References