CVE-2021-37040Network attack vector

File privilege escalation via CIFS parameter injection

Published Dec 8, 2021 · Updated Aug 4, 2024

Parameter injection in Huawei EMUI 11.0.0 and HarmonyOS 2.0 allows remote attackers to escalate file privileges after mounting a CIFS share. Huawei identifies parameter injection during CIFS share mounting but has not published the affected component, parameter, or unsafe operation. Exploitation requires a CIFS share mount and can change file privileges; no broader code execution or device compromise is publicly documented.

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

Parameter injection in Huawei EMUI 11.0.0 and HarmonyOS 2.0 allows remote attackers to escalate file privileges after mounting a CIFS share. Huawei identifies parameter injection during CIFS share mounting but has not published the affected component, parameter, or unsafe operation. Exploitation requires a CIFS share mount and can change file privileges; no broader code execution or device compromise is publicly documented.

The record

CVE
CVE-2021-37040
Published
Dec 8, 2021
Updated
Aug 4, 2024
Vendor
MindSpore
Product
HarmonyOS
Classifications
CWE-88, T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 8, 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=2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MindSpore · HarmonyOSversion=2.0
MindSpore · EMUIversion=11.0.0

Published CVSS scores

6.8NIST NVDAV:N/AC:M/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

CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
T1068Exploitation 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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