Is CVE-2021-42851 in the CISA KEV catalog?

No. CVE-2021-42851 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-42851?

CVE-2021-42851 has a CVSS v3 base score of 6.3 (MEDIUM).

What is the EPSS score for CVE-2021-42851?

CVE-2021-42851 has an EPSS score of 0.55% (42th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-42851?

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

CVE & CISA-KEV Catalog

CVE-2021-42851

MEDIUM

6.3

CVSS v3

NVD

Description

A vulnerability was reported in some Lenovo Personal Cloud Storage devices that could allow an unauthenticated user to create a standard user account.

CWE-862Missing Authorization

How to fix

Remediation Available

a1 firmwareNVD

Affected:< 5.3.6.a1Fixed in:5.3.6.a1CVE-2021-42851derived from NVD

t1 firmwareNVD

Affected:< 5.3.6.t1Fixed in:5.3.6.t1CVE-2021-42851derived from NVD

t2 firmwareNVD

Affected:< 5.3.8.t2Fixed in:5.3.8.t2CVE-2021-42851derived from NVD

t2pro firmwareNVD

Affected:< 5.3.7.t2-proFixed in:5.3.7.t2-proCVE-2021-42851derived from NVD

x1 firmwareNVD

Affected:< 5.3.8.x1Fixed in:5.3.8.x1CVE-2021-42851derived 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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.55%probability of exploitation in 30 days

42ndpercentile

Moderate risk: more likely to be exploited than 42% of all known CVEs.

References

Vendor Advisory1

iknow.lenovo.com.cn

Related Vulnerabilities

Other CWE-862 (Missing Authorization) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-39226	Critical	9.8	100%	KEV	Fix
CVE-2022-0543	Critical	10.0	100%	KEV	Fix
CVE-2021-21978	Critical	9.8	99%	-	Fix
CVE-2023-52163	High	8.8	96%	KEV	-
CVE-2022-1329	High	8.8	93%	-	-
CVE-2023-6875	Critical	9.8	90%	-	-

Embed a live status badge for CVE-2021-42851

Markdown

[![CVE-2021-42851](https://tridentstack.com/cve/badge/CVE-2021-42851.svg)](https://tridentstack.com/cve/CVE-2021-42851)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-42851"><img src="https://tridentstack.com/cve/badge/CVE-2021-42851.svg" alt="CVE-2021-42851"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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.