CVE-2021-20996
WAGO: Managed Switches: Unsecure Cookie settings
In multiple managed switches by WAGO in different versions special crafted requests can lead to cookies being transferred to third parties.
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: Unsecure Cookie settings
In multiple managed switches by WAGO in different versions special crafted requests can lead to cookies being transferred to third parties.
- Record
CVE-2021-20996- 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-732
- Updated
- 2026-11-02
EUVDEUVD-2021-8405
In multiple managed switches by WAGO in different versions special crafted requests can lead to cookies being transferred to third parties.
- Record
EUVD-2021-8405- 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-6gx8-4r4f-rfmq No score
In multiple managed switches by WAGO in different versions special crafted requests can lead to...
In multiple managed switches by WAGO in different versions special crafted requests can lead to cookies being transferred to third parties.
- Record
GHSA-6gx8-4r4f-rfmq- Weakness
- CWE-732
- Updated
- 2026-11-02
NVD
In multiple managed switches by WAGO in different versions special crafted requests can lead to cookies being transferred to third parties.
- Record
CVE-2021-20996- 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 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-732
- 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-2021-20996 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 0.75%, the 55th percentile. No source names a fixed version.