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Fencer Vulns
high 8.8

CVE-2021-42850 json

A weak default administrator password for the web interface and serial port was reported in some Lenovo Personal Cloud Storage devices that…

published 2022-05-18 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29805

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits
0
none known

Summary

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.

Patch / fix

  • Lenovo Personal Cloud Storage A1 5.3.6.a1
  • Lenovo Personal Cloud Storage T1 5.3.6.t1
  • Lenovo Personal Cloud Storage X1 5.3.8.x1
  • Lenovo Personal Cloud Storage T2 5.3.8.t2
  • Lenovo Personal Cloud Storage T2Pro 5.3.7.t2-pro

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Lenovo Personal Cloud Storage A1
  • Lenovo Personal Cloud Storage T1
  • Lenovo Personal Cloud Storage X1
  • Lenovo Personal Cloud Storage T2
  • Lenovo Personal Cloud Storage T2Pro

Classification

Weakness
  • CWE-798 Use of Hard-coded Credentials

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.