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Security Advisory - Information Disclosure Vulnerability in some Huawei Products

  • SA No:huawei-sa-20211208-01-informationleak
  • Initial Release Date: Dec 08, 2021
  • Last Release Date: Dec 08, 2021

There is an information leak vulnerability in some Huawei products. The vulnerability is caused by improper log output management. An attacker with the ability to access the log file of device may lead to information disclosure.(Vulnerability ID: HWPSIRT-2020-23793)
This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2021-40007.
Huawei has released software updates to fix this vulnerability. This advisory is available at the following link:

Product Name

Affected Version

Resolved Product and Version




An attacker with the ability to access the log file of device can cause the information leak.

The vulnerability classification has been performed by using the CVSSv3 scoring system (

Base Score: 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)

Temporal Score: 6.0 (E:F/RL:O/RC:C)

This vulnerability can be exploited only when the following conditions are present:

An attacker with the ability to access the device.

Vulnerability details:

There is an information leak vulnerability in some Huawei products, and it could allow an attacker to login the device and get information. The vulnerability is due to the improper management of the log output. An attacker with the ability to access the log file of device and cause the information leak.

Customers should contact Huawei TAC (Huawei Technical Assistance Center) to request the upgrades. For TAC contact information, please refer to Huawei worldwide website at

This vulnerability was discovered by Huawei internal tester.

2021-12-08 V1.0 INITIAL

Huawei adheres to protecting the ultimate interests of users with best efforts and the principle of responsible disclosure and deal with product security issues through our response mechanism.

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