Cyber Resilience

CVE-2020-21883

HighPublic PoCRCE

Published: 09 April 2021

Published
09 April 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.1120 93.7th percentile
Risk Priority 24 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2020-21883 is a high-severity OS Command Injection (CWE-78) vulnerability in Indionetworks Unibox U50 Firmware. Its CVSS base score is 8.8 (High).

Operationally, ranked in the top 6.3% 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

Unibox U-50 2.4 and UniBox Enterprise Series 2.4 and UniBox Campus Series 2.4 contain a OS command injection vulnerability in /tools/ping, which can leads to complete device takeover.

CWE(s)
CWE-78

Related Threats

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

Affected Assets

indionetworks
unibox u50 firmware
2.4
indionetworks
unibox u500 firmware
2.4
indionetworks
unibox u1000 firmware
2.4
indionetworks
unibox u2500 firmware
2.4
indionetworks
unibox u5000 firmware
2.4

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