CVE-2021-40055
There is a man-in-the-middle attack vulnerability during system update download in recovery mode....
There is a man-in-the-middle attack vulnerability during system update download in recovery mode. Successful exploitation of this vulnerability may affect integrity.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
There is a man-in-the-middle attack vulnerability during system update download in recovery mode. Successful exploitation of this vulnerability may affect integrity.
- Record
CVE-2021-40055- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 7.1 High
AV:N/AC:M/Au:N/C:N/I:C/A:N - Updated
- 2026-11-02
CVE List No score
There is a man-in-the-middle attack vulnerability during system update download in recovery mode. Successful exploitation of this vulnerability may affect integrity.
- Record
CVE-2021-40055- Updated
- 2026-11-02
EUVDEUVD-2021-27245 No score
There is a man-in-the-middle attack vulnerability during system update download in recovery mode. Successful exploitation of this vulnerability may affect integrity.
- Record
EUVD-2021-27245- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-922x-wr7x-r9pf
There is a man-in-the-middle attack vulnerability during system update download in recovery mode....
There is a man-in-the-middle attack vulnerability during system update download in recovery mode. Successful exploitation of this vulnerability may affect integrity.
- Record
GHSA-922x-wr7x-r9pf- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-40055 is a medium vulnerability (CVSS 5.9) in Huawei Emui, published March 7, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.51%, the 44th percentile. No source names a fixed version.