Cyber Resilience

CVE-2021-42884

CriticalPublic PoCRCE

Published: 03 June 2022

Published
03 June 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 0.2178 95.9th percentile
Risk Priority 33 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-42884 is a critical-severity OS Command Injection (CWE-78) vulnerability in Totolink Ex1200T Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 4.1% 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

TOTOLINK EX1200T V4.1.2cu.5215 contains a remote command injection vulnerability in function setDeviceName of the file global.so which can control thedeviceName to attack.

CWE(s)
CWE-78

Related Threats

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

Affected Assets

totolink
ex1200t firmware
4.1.2cu.5215

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

References