CVE-2021-40041

Information disclosure via network-settings script injection

Published Jan 7, 2022 · Updated Aug 4, 2024

Cross-site scripting in Huawei WS318n-21 10.0.2.2, 10.0.2.5, and 10.0.2.6 allows remote authenticated users to disclose information. The network-settings interface insufficiently validates special characters supplied as input, allowing them to become executable web content. Exploitation requires adjacent-network access and a high-privilege login; Huawei reports information disclosure as the bounded consequence.

CVSS severity2.4
Low
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Huawei WS318n-21 10.0.2.2, 10.0.2.5, and 10.0.2.6 allows remote authenticated users to disclose information. The network-settings interface insufficiently validates special characters supplied as input, allowing them to become executable web content. Exploitation requires adjacent-network access and a high-privilege login; Huawei reports information disclosure as the bounded consequence.

The record

CVE
CVE-2021-40041
Published
Jan 7, 2022
Updated
Aug 4, 2024
Vendor
Huawei Technologies Co., Ltd.
Product
WS318n-21
Classifications
CWE-79
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Jan 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

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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=10.0.2.2
  2. Affected versionversion=10.0.2.5
  3. Affected versionversion=10.0.2.6

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

Huawei Technologies Co., Ltd. · WS318n-21version=10.0.2.2; version=10.0.2.5; version=10.0.2.6

Published CVSS scores

1.9NVDAV:L/AC:M/Au:N/C:N/I:P/A:N
4.2NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
2.4Huawei PSIRTCVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
2.3Huawei PSIRTCVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N/E:F/RL:O/RC: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.

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No observations available

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

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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