CVE-2020-7584
No exploitation reported by the sources we read.
- Published2020-07-14
- Fixed in2.5.1
- WeaknessCWE-400
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
A vulnerability has been identified in SIMATIC S7-200 SMART CPU family (All versions >= V2.2 < V2.5.1). Affected devices do not properly handle large numbers of new incomming connections and could crash under certain circumstances. An attacker may leverage this to cause a Denial-of-Service situation.
Timeline
dates in UTC- 2020-07-1414:15CVE 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-2020-7584?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-7584?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 2.x | ≥ 2.2, < 2.5.1 | 2.5.1 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 2.x | ≥ 2.2, < 2.5.1 | 2.5.1 | NVD |
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 SIMATIC S7-200 SMART CPU Family
SIMATIC S7-200 SMART CPU family: v2.2 and later prior to v2.5.1
Fix
- Update Siemens simatic s7-200 smart sr cpu firmware to 2.5.1
- Vendor fix CISA ICSA-20-196-06 · 1 productSiemens recommends users update to v2.5.1 and limit network access to device to trusted sources.
- Vendor fix CISA ICSA-20-196-06 · 1 productAs a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens ' operational guidelines for Industrial Security and…
- Vendor fix CISA ICSA-20-196-06 · 1 productAdditional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity
Advisories and patches
- cert-portal.siemens.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.17.5read 2026-10-23
- NVDCVSS 2.05read 2026-10-23
- CNAweakness (CWE)CWE-400read 2026-10-23
- NVDweakness (CWE)CWE-400read 2026-10-23
- FIRST EPSSEPSS score1.0 %2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2020-07-14
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-7584?
Is CVE-2020-7584 actively exploited?
What is the CVSS score for CVE-2020-7584?
Running Siemens SIMATIC S7-200 SMART? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.