CVE-2020-28400
No exploitation reported by the sources we read.
- Published2021-07-13
- Fixed in6.4
- WeaknessCWE-770
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a denial of service condition. The vulnerability can be triggered if a large amount of DCP reset packets are sent to the device.
Timeline
dates in UTC- 2021-07-1311:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-28400?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-28400?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
CISA-ADP| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.4 | < 6.4 | 6.4 | CISA-ADP |
| 0.x | = 0 | no fix published | CISA-ADP |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.4 | < v6.4 | v6.4 | CISA-ADP |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 0.x | = 0 | no fix published | CISA-ADP |
109 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Siemens PROFINET Devices
Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet Controller · Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200 · Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P · +353 more
Fix
- Update Seimens scalance m812-1 adsl-router annex b to 6.4
- Vendor fix CISA ICSA-21-194-03 · 3 productsUpdate to V1.1.3 or later version
- Vendor fix CISA ICSA-21-194-03 · 2 productsUpdate to V2.0.0 or later version
- Vendor fix CISA ICSA-21-194-03 · 2 productsUpdate to V2.1.3 or later version
- Vendor fix CISA ICSA-21-194-03 · 1 productUpdate to V3.0 or later version
- Vendor fix CISA ICSA-21-194-03 · 75 productsUpdate to V4.1.4 or later version
- Vendor fix CISA ICSA-21-194-03 · 71 productsUpdate to V4.3 or later version
Advisories and patches
- cert-portal.siemens.comPatch · Vendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 4.0 vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Published
- 2021-07-13
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-28400?
Is CVE-2020-28400 actively exploited?
What is the CVSS score for CVE-2020-28400?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.