01 Record
CVE-2021-21000
WAGO: PFC200 Denial of Service due to the number of connections to the runtime
MediumPUBLISHEDCNA: CERTVDE
CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
02 Description
WAGO: PFC200 Denial of Service due to the number of connections to the runtime
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.03% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 63.6% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-05-24 11:05Z5 YR AGO
- Last updated
- 2024-09-16 18:43Z2 YR AGO
- Reserved
- 2020-12-17
- Assigning CNA
- CERTVDE
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.3)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weaknesses
- CWE-770Allocation of Resources Without Limits or ThrottlingBase
- Data version
- 5.1
- Document digest
- 2f5d19f48682d51c1ec77d674a184c72ff64252965c56076afd0f4a8126e0f74
05 Affected products
VendorProductVersionsPlatforms
WAGOSeries PFC200 Controller750-823 to FW07, 750-829 to FW14, 750-831/000-00x to FW14, 750-832/000-00x to FW06, 750-852 to FW14, 750-862 to FW07, 750-880/0xx-xxx to FW15, 750-881 to FW14, 750-882 to FW14, 750-885/0xx-xxx to FW14, 750-889 to FW14, 750-890/0xx-xxx to FW07, 750-891 to FW07, 750-893 to FW07—
WAGOSeries Ethernet Controller750-8202/xxx-xxx to < 03.06.19 (18), 750-8203/xxx-xxx to < 03.06.19 (18), 750-8204/xxx-xxx to < 03.06.19 (18), 750-8206/xxx-xxx to < 03.06.19 (18), 750-8207/xxx-xxx to < 03.06.19 (18), 750-8208/xxx-xxx to < 03.06.19 (18), 750-8210/xxx-xxx to < 03.06.19 (18), 750-8211/xxx-xxx to < 03.06.19 (18), 750-8212/xxx-xxx to < 03.06.19 (18), 750-8213/xxx-xxx to < 03.06.19 (18), 750-8214/xxx-xxx to < 03.06.19 (18), 750-8216/xxx-xxx to < 03.06.19 (18), 750-8217/xxx-xxx to < 03.06.19 (18)—
06 References
07 Remediation
WAGO recommends all effected users with CODESYS 2.3 Runtime PLCs to update to the firmware versions listed at https://cert.vde.com/en-us/advisories/vde-2021-014 in the solution paragraph.