Is CVE-2021-42852 in the CISA KEV catalog?

No. CVE-2021-42852 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-42852?

CVE-2021-42852 has a CVSS v3 base score of 8.0 (HIGH).

What is the EPSS score for CVE-2021-42852?

CVE-2021-42852 has an EPSS score of 0.80% (52th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-42852?

Upgrade a1 firmware to 5.3.6.a1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2021-42852

HIGH

8.0

CVSS v3

NVD

Description

A command injection vulnerability was reported in some Lenovo Personal Cloud Storage devices that could allow an authenticated user to execute operating system commands by sending a crafted packet to the device.

CWE-78OS Command Injection

How to fix

Remediation Available

a1 firmwareNVD

Affected:< 5.3.6.a1Fixed in:5.3.6.a1CVE-2021-42852derived from NVD

t1 firmwareNVD

Affected:< 5.3.6.t1Fixed in:5.3.6.t1CVE-2021-42852derived from NVD

t2 firmwareNVD

Affected:< 5.3.8.t2Fixed in:5.3.8.t2CVE-2021-42852derived from NVD

t2pro firmwareNVD

Affected:< 5.3.7.t2-proFixed in:5.3.7.t2-proCVE-2021-42852derived from NVD

x1 firmwareNVD

Affected:< 5.3.8.x1Fixed in:5.3.8.x1CVE-2021-42852derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.80%probability of exploitation in 30 days

52ndpercentile

Moderate risk: more likely to be exploited than 52% of all known CVEs.

References

Vendor Advisory1

iknow.lenovo.com.cn

Related Vulnerabilities

Other CWE-78 (OS Command Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-1498	Critical	9.8	100%	KEV	Fix
CVE-2014-6271	Critical	9.8	100%	KEV	Fix
CVE-2019-16920	Critical	9.8	100%	KEV	-
CVE-2022-44877	Critical	9.8	100%	KEV	Fix
CVE-2020-8515	Critical	9.8	100%	KEV	-
CVE-2020-9054	Critical	9.8	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.