PatchTheCVECVE-2021-42851: A vulnerability was reported in some Lenovo Personal Cloud Storage devices that could allow an unauthenticated
CVE-2021-42851 is a medium-severity flaw (CVSS 6.3) affecting a1 firmware, t1 firmware, x1 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A vulnerability was reported in some Lenovo Personal Cloud Storage devices that could allow an unauthenticated user to create a standard user account.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.3 (Medium) |
| Attack vector | Adjacent network |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.6% (top 52%) |
| CISA exploited list | No |
| Weakness | CWE-862 |
| Published | 2022-05-18 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-42851?
a1 firmware: upgrade to 5.3.6.a1; t1 firmware: upgrade to 5.3.6.t1; x1 firmware: upgrade to 5.3.8.x1. Exact commands for each OS are on this page.
Is CVE-2021-42851 being exploited?
CVE-2021-42851 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-42851 affect?
CVE-2021-42851 affects a1 firmware, t1 firmware, x1 firmware. Severity is medium (CVSS 6.3). A vulnerability was reported in some Lenovo Personal Cloud Storage devices that could allow an unauthenticated user to create a standard user account.
How urgent is CVE-2021-42851?
Priority 34/100. No elevated risk signals yet.
Software pages
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