CVE-2021-21000 json
WAGO: PFC200 Denial of Service due to the number of connections to the runtime
published 5y ago modified 4mo ago also EUVD-2021-8409
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 64%
- public exploits
- 0
- none known
Summary
On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime.
Patch / fix
- WAGO Series Ethernet Controller 03.06.19 (18)
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Check with FencerExploit prediction
1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- WAGO Series PFC200 Controller
- WAGO Series Ethernet Controller
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
References
-
cert.vde.com
/en-us/advisories/vde-2021-014
third-party-advisory
Sources
- CVE List CVE-2021-21000
- NVD CVE-2021-21000
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