CVE-2021-42850

Administrator access via weak default credentials

Published May 18, 2022 · Updated Aug 4, 2024

Hard-coded credentials in Lenovo Personal Cloud Storage A1, T1, T2, T2Pro, and X1 allow attackers to gain administrator access. The web interface and serial port accept a weak default administrator password; Lenovo has not disclosed the credential's storage or comparison locus. Exploitation requires local-network or physical access and grants unauthorized control with confidentiality, integrity, and availability impact.

CVSS severity8.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in Lenovo Personal Cloud Storage A1, T1, T2, T2Pro, and X1 allow attackers to gain administrator access. The web interface and serial port accept a weak default administrator password; Lenovo has not disclosed the credential's storage or comparison locus. Exploitation requires local-network or physical access and grants unauthorized control with confidentiality, integrity, and availability impact.

The record

CVE
CVE-2021-42850
Published
May 18, 2022
Updated
Aug 4, 2024
Vendor
Lenovo
Product
Personal Cloud Storage T2
Classifications
CWE-798, T1078.001
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <5.3.8.t2

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Lenovo · Personal Cloud Storage T2version=unspecified <5.3.8.t2
Lenovo · Personal Cloud Storage A1version=unspecified <5.3.6.a1
Lenovo · Personal Cloud Storage T1version=unspecified <5.3.6.t1
Lenovo · Personal Cloud Storage X1version=unspecified <5.3.8.x1
Lenovo · Personal Cloud Storage T2Proversion=unspecified <5.3.7.t2-pro

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8Lenovo Group Ltd.CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1078.001Valid Accounts: Default Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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