CVE-2021-37127Network attack vector

System file overwrite via forged update signature

Published Oct 27, 2021 · Updated Aug 4, 2024

Improper signature verification in Huawei iManager NetEco and NetEco 6000 allows remote authenticated users to overwrite system files. The firmware update path accepts a forged signature as valid, allowing a forged system file to replace the legitimate file. Exploitation requires administrative privileges, device access, and interaction with the update process; the overwrite can compromise confidentiality, integrity, and availability.

CVSS severity6.4
Medium
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper signature verification in Huawei iManager NetEco and NetEco 6000 allows remote authenticated users to overwrite system files. The firmware update path accepts a forged signature as valid, allowing a forged system file to replace the legitimate file. Exploitation requires administrative privileges, device access, and interaction with the update process; the overwrite can compromise confidentiality, integrity, and availability.

The record

CVE
CVE-2021-37127
Published
Oct 27, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-347, T1553.002
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 27, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.9HuaweiCVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
9.0NIST NVDAV:N/AC:L/Au:S/C:C/I:C/A:C
6.4HuaweiCVSS:3.0/AV:N/AC:H/PR:H/UI:R/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1553.002Subvert Trust Controls: Code Signing

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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