Cyber Resilience

CVE-2021-40858

MediumPublic PoC

Published: 13 December 2021

Published
13 December 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0171 82.7th percentile
Risk Priority 11 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-40858 is a medium-severity Path Traversal (CWE-22) vulnerability in Auerswald Compact 5500R Ip Firmware. Its CVSS base score is 4.9 (Medium).

Operationally, ranked in the top 17.3% 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

Auerswald COMpact 5500R devices before 8.2B allow Arbitrary File Disclosure. A sub-admin can read the cleartext Admin password via the fileName=../../etc/passwd substring.

CWE(s)
CWE-22

Related Threats

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

Affected Assets

auerswald
compact 5500r ip firmware
≤ 8.0b
auerswald
compact 5200r ip firmware
≤ 8.0b
auerswald
compact 5000r ip firmware
≤ 8.0b
auerswald
compact 4000 ip firmware
≤ 8.0b
auerswald
commander 6000r ip firmware
≤ 8.0b
auerswald
commander 6000rx ip firmware
≤ 8.0b
auerswald
commander business\(19\"\) ip firmware
≤ 8.0b
auerswald
commander basic.2\(19\"\) ip firmware
≤ 8.0b
auerswald
compact 5010 voip ip firmware
≤ 8.0b
auerswald
compact 5020 voip ip firmware
≤ 8.0b

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.

SI-10 Information Input Validation
addresses: CWE-22

Validates pathnames and filenames to prevent traversal outside intended directories.

References