Cyber Resilience

CVE-2021-45986

CriticalRCE

Published: 04 February 2022

Published
04 February 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 0.0208 84.3th percentile
Risk Priority 21 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-45986 is a critical-severity OS Command Injection (CWE-78) vulnerability in Tendacn G1 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 15.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Tenda routers G1 and G3 v15.11.0.17(9502)_CN were discovered to contain a command injection vulnerability in the function formSetUSBShareInfo. This vulnerability allows attackers to execute arbitrary commands via the usbOrdinaryUserName parameter.

CWE(s)
CWE-78

Related Threats

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

Affected Assets

tendacn
g1 firmware
15.11.0.17\(9502\)_cn
tendacn
g3 firmware
15.11.0.17\(9502\)_cn

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