CVE-2021-20997
WAGO: Managed Switches: Unauthorized access to password hashes
In multiple managed switches by WAGO in different versions it is possible to read out the password hashes of all Web-based Management users.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
WAGO: Managed Switches: Unauthorized access to password hashes
In multiple managed switches by WAGO in different versions it is possible to read out the password hashes of all Web-based Management users.
- Record
CVE-2021-20997- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-522
- Updated
- 2026-11-02
EUVDEUVD-2021-8406
In multiple managed switches by WAGO in different versions it is possible to read out the password hashes of all Web-based Management users.
- Record
EUVD-2021-8406- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-9w62-6mhp-433w No score
In multiple managed switches by WAGO in different versions it is possible to read out the...
In multiple managed switches by WAGO in different versions it is possible to read out the password hashes of all Web-based Management users.
- Record
GHSA-9w62-6mhp-433w- Weakness
- CWE-522
- Updated
- 2026-11-02
NVD
In multiple managed switches by WAGO in different versions it is possible to read out the password hashes of all Web-based Management users.
- Record
CVE-2021-20997- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-522
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-20997 is a high vulnerability (CVSS 7.5) in Wago 0852-0303, published May 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.02%, the 63rd percentile. No source names a fixed version.