CVE-2021-22323Network attack vector

Root privilege escalation via integer overflow

Published Jun 30, 2021 · Updated Aug 3, 2024

Integer overflow in Huawei EMUI 10.1.1 and 11.0.0 and Magic UI 3.1.1 and 4.0.0 allows remote attackers to obtain root access via network input. Huawei identifies memory leaks and out-of-bounds access but does not disclose the affected component, the input that reaches it, or the incorrect arithmetic operation. No authentication or user interaction is required, and successful exploitation grants root-level control of the affected phone.

CVSS severity9.8
Critical
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Huawei EMUI 10.1.1 and 11.0.0 and Magic UI 3.1.1 and 4.0.0 allows remote attackers to obtain root access via network input. Huawei identifies memory leaks and out-of-bounds access but does not disclose the affected component, the input that reaches it, or the incorrect arithmetic operation. No authentication or user interaction is required, and successful exploitation grants root-level control of the affected phone.

The record

CVE
CVE-2021-22323
Published
Jun 30, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190, T1626
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C

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-190Integer Overflow or Wraparound
T1626Abuse Elevation Control Mechanism

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

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Your stack

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