8.2

CVE-2022-4020: acer aspire_a115-21_firmware Incorrect Default Permissions

CVSS: 8.2v3.1HighModified
Published 28-11-2022Last modified 14-04-2025
Open JSON

Vulnerability summary

CVE-2022-4020 is a high (CVSS 8.2) Incorrect Default Permissions vulnerability in acer aspire_a115-21_firmware. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 14.9% of scored vulnerabilities.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.2/10
010
High · v3.1 (NVD)
EPSS score
0.25%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 28-11-2022
    PublishedVulnerability first disclosed.
  2. 14-04-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

0.00 pp

From 0.25% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.25%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Acer5 products

1 vendor · 5 products

References

1 links