CVE-2021-36986Network attack vector

Privilege escalation via kernel out-of-bounds write

Published Oct 28, 2021 · Updated Aug 4, 2024

Out-of-bounds write in the kernel of Huawei EMUI 10.1.1 and 11.0.0 allows attackers to escalate privileges via unspecified vectors. Huawei has not disclosed the affected kernel component or the operation that writes beyond its intended memory boundary. The required access and trigger remain undisclosed, and the documented consequence is limited to elevated permissions.

CVSS severity9.8
Critical
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the kernel of Huawei EMUI 10.1.1 and 11.0.0 allows attackers to escalate privileges via unspecified vectors. Huawei has not disclosed the affected kernel component or the operation that writes beyond its intended memory boundary. The required access and trigger remain undisclosed, and the documented consequence is limited to elevated permissions.

The record

CVE
CVE-2021-36986
Published
Oct 28, 2021
Updated
Aug 4, 2024
Vendor
MindSpore
Product
EMUI
Classifications
T1404
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 28, 2021CVE 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

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Is a vulnerable build present?

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

  1. Affected versionversion=10.1.1
  2. Affected versionversion=11.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MindSpore · EMUIversion=10.1.1; version=11.0.0

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

T1404Exploitation for Privilege Escalation

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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