PatchTheCVECVE-2021-42850: A weak default administrator password for the web interface and serial port was reported in some Lenovo Person
CVE-2021-42850 is a high-severity flaw (CVSS 8.8) 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 weak default administrator password for the web interface and serial port was reported in some Lenovo Personal Cloud Storage devices that could allow unauthorized device access to an attacker with physical or local network access.
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Adjacent network |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 85%) |
| CISA exploited list | No |
| Weakness | CWE-798 |
| 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-2021-42850?
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-2021-42850 being exploited?
CVE-2021-42850 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-2021-42850 affect?
CVE-2021-42850 affects a1 firmware, t1 firmware, x1 firmware. Severity is high (CVSS 8.8). A weak default administrator password for the web interface and serial port was reported in some Lenovo Personal Cloud Storage devices that could allow unauthorized device access to an attacker with physical or local network access.
How urgent is CVE-2021-42850?
Priority 35/100. High severity
Software pages
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