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Fencer Intel
high 8.1

CVE-2022-4020 json

Acer Aspire BIOS vulnerability

published 3y ago modified 4mo ago also EUVD-2022-51399

cvss
8.1
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 16%
public exploits
0
none known

Summary

Vulnerability in the HQSwSmiDxe DXE driver on some consumer Acer Notebook devices may allow an attacker with elevated privileges to modify UEFI Secure Boot settings by modifying an NVRAM variable.

Patch / fix

  • Acer Aspire A315-22 1.11
  • Acer Aspire A115-21 1.11
  • Acer Aspire A315-22G 1.11
  • Acer Extensa EX215-21 1.11
  • Acer Extensa EX215-21G 1.11

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:H
NVD 3.1 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

  • Acer Aspire A315-22
  • Acer Aspire A115-21
  • Acer Aspire A315-22G
  • Acer Extensa EX215-21
  • Acer Extensa EX215-21G

Classification

Weakness
  • CWE-276 Incorrect Default Permissions

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.