CVE-2021-20995
WAGO: Managed Switches: Storage of user credentials in a cookie
In multiple managed switches by WAGO in different versions the webserver cookies of the web based UI contain user credentials.
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
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
WAGO: Managed Switches: Storage of user credentials in a cookie
In multiple managed switches by WAGO in different versions the webserver cookies of the web based UI contain user credentials.
- Record
CVE-2021-20995- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-312
- Updated
- 2026-11-02
EUVDEUVD-2021-8404
In multiple managed switches by WAGO in different versions the webserver cookies of the web based UI contain user credentials.
- Record
EUVD-2021-8404- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-h3wh-323m-4h77 No score
In multiple managed switches by WAGO in different versions the webserver cookies of the web based...
In multiple managed switches by WAGO in different versions the webserver cookies of the web based UI contain user credentials.
- Record
GHSA-h3wh-323m-4h77- Weakness
- CWE-312
- Updated
- 2026-11-02
NVD
In multiple managed switches by WAGO in different versions the webserver cookies of the web based UI contain user credentials.
- Record
CVE-2021-20995- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - 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-312
- 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-2021-20995 is a medium vulnerability (CVSS 5.3) 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 0.54%, the 45th percentile. No source names a fixed version.