CVE-2021-40054Network attack vector

Integrity compromise via atcmdserver integer underflow

Published Mar 7, 2022 · Updated Aug 4, 2024

Integer underflow in Huawei EMUI 10.0.0, 10.1.0, 10.1.1, 11.0.0, 11.0.1, and 12.0.0 allows remote attackers to compromise integrity via atcmdserver. Huawei has not disclosed the arithmetic operation, input path, or affected state that causes the atcmdserver value to underflow. Exploitation requires no authentication or user interaction; the documented consequence is limited to an unspecified integrity impact.

CVSS severity7.5
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Integer underflow in Huawei EMUI 10.0.0, 10.1.0, 10.1.1, 11.0.0, 11.0.1, and 12.0.0 allows remote attackers to compromise integrity via atcmdserver. Huawei has not disclosed the arithmetic operation, input path, or affected state that causes the atcmdserver value to underflow. Exploitation requires no authentication or user interaction; the documented consequence is limited to an unspecified integrity impact.

The record

CVE
CVE-2021-40054
Published
Mar 7, 2022
Updated
Aug 4, 2024
Vendor
MindSpore
Product
EMUI
Classifications
CWE-191
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 7, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.0
  2. Affected versionversion=10.1.0
  3. Affected versionversion=10.1.1
  4. Affected versionversion=11.0.0
  5. Affected versionversion=11.0.1
  6. Affected versionversion=12.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MindSpore · EMUIversion=10.0.0; version=10.1.0; version=10.1.1; version=11.0.0; version=11.0.1; version=12.0.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:C/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-191Integer Underflow (Wrap or Wraparound)

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo