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NVD / CVE Program· CNA huawei

CVE-2021-40020: There is an Out-of-bounds array read vulnerability in the security storage module in smartphones.

HighCVSS 7.5 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.69% (FIRST EPSS); higher than 53.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

There is an Out-of-bounds array read vulnerability in the security storage module in smartphones. Successful exploitation of this vulnerability may affect service confidentiality.

Published
Jan 10, 2022
Updated
Jun 17, 2026
EPSS
0.6% · 53th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-40020

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
huaweiemui
huaweimagic ui

Versions reported by the vendor

Affected version ranges reported by the assigning authority (huawei). Independent of NVD's CPE analysis and usually ahead of it.

  • Huawei EMUI

    • 11.0.0, 10.1.1, 10.1.0, 10.0.0affected

  • Huawei Magic UI

    • 4.0.0, 3.1.1, 3.1.0, 3.0.0affected
Affected versions · NVD (8)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • huawei emui10.0.0
  • huawei emui10.1.0
  • huawei emui10.1.1
  • huawei emui11.0.0
  • huawei magic ui3.0.0
  • huawei magic ui3.1.0
  • huawei magic ui3.1.1
  • huawei magic ui4.0.0

Same product

huawei: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-57961Out-of-bounds write vulnerability in the emcom module Impact: Successful exploitation of this vulnerability may cause features to perform…
    39Monitor
  • CVE-2024-57959Use-After-Free (UAF) vulnerability in the display module Impact: Successful exploitation of this vulnerability may cause features to…
    39Monitor
  • CVE-2024-32991Permission verification vulnerability in the wpa_supplicant module Impact: Successful exploitation of this vulnerability will affect…
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-40010Jan 10, 2022 · The bone voice ID TA has a heap overflow vulnerability.Successful exploitation of this vulnerability may result in malicious code execution.
    39Monitor
  • ← EarlierCVE-2021-40011Jan 10, 2022 · There is an uncontrolled resource consumption vulnerability in the display module.
    30Monitor
  • Later →CVE-2021-40031Jan 10, 2022 · There is a Null pointer dereference vulnerability in the camera module in smartphones.
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records