Uncontrolled resource consumption in Siemens SIMATIC S7-200 SMART CPU family
Priority LOW 35CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.
Summary
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.
Why it matters now
EPSS 0.01044 64th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Siemens | SIMATIC S7-200 SMART CPU family | All versions >= V2.2 < V2.5.1 | — | No fix listed | CNA |
- SIMATIC S7-200 SMART CPU family VendorSiemens Affected All versions >= V2.2 < V2.5.1 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:siemens:simatic_s7-200_smart_sr_cpu_firmware:*:*:*:*:*:*:*:* | 2.2 to before 2.5.1 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_s7-200_smart_sr_cpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_s7-200_smart_st_cpu_firmware:*:*:*:*:*:*:*:* | 2.2 to before 2.5.1 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_s7-200_smart_st_cpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
- cpe:2.3:o:siemens:simatic_s7-200_smart_sr_cpu_firmware:*:*:*:*:*:*:*:* Versions 2.2 to before 2.5.1 Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_s7-200_smart_sr_cpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_s7-200_smart_st_cpu_firmware:*:*:*:*:*:*:*:* Versions 2.2 to before 2.5.1 Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_s7-200_smart_st_cpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-7584
- 2026-10-03 Alias added: GHSA-vpvj-7qfp-4qgg
References
Sources
- CVE-2020-7584 · CVE Program
- CVE-2020-7584 · NVD
- FIRST EPSS
- GHSA-vpvj-7qfp-4qgg · GitHub Advisory Database · CC BY 4.0
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