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Fencer Intel
medium 6.4

CVE-2020-8321 json

A potential vulnerability in the SMI callback function used in the System Lock Preinstallation driver in some Lenovo Notebook and ThinkStat…

published 6y ago modified 4mo ago also EUVD-2020-29188

cvss
6.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

A potential vulnerability in the SMI callback function used in the System Lock Preinstallation driver in some Lenovo Notebook and ThinkStation models may allow arbitrary code execution.

Patch / fix

  • lenovo thinkstation_p410_firmware s00kya7a
  • lenovo thinkstation_p500_firmware a4kt67a
  • lenovo thinkstation_p510_firmware s00kya7a
  • lenovo thinkstation_p520_firmware 2020-09-01
  • lenovo thinkstation_p520c_firmware 2020-09-01
  • lenovo thinkstation_p700_firmware a5kta7a
  • lenovo thinkstation_p710_firmware s01kt67a
  • lenovo thinkstation_p720_firmware 2020-09-01
  • lenovo thinkstation_p900_firmware a6kta7a
  • lenovo thinkstation_p910_firmware s02kt67a
  • lenovo thinkstation_p920_firmware 2020-09-01

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Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/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 BIOS

References

Sources

Fencer Intel 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.