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Fencer Vulns
high 8.0

CVE-2021-42852 json

A command injection vulnerability was reported in some Lenovo Personal Cloud Storage devices that could allow an authenticated user to exec…

published 2022-05-18 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29807

cvss
8.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

A command injection vulnerability was reported in some Lenovo Personal Cloud Storage devices that could allow an authenticated user to execute operating system commands by sending a crafted packet to the device.

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

0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.0 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.0 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.7 AV:A/AC:L/Au:S/C:C/I:C/A:C

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-78 Improper Neutralization of Special Elements used in an OS Command

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.