Siemens SIMATIC S7-300 Profinet-enabled CPU devices with firmware before 3.2.12 and…
Priority MEDIUM 40CWE-399Published · 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 3.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.
Summary
Siemens SIMATIC S7-300 Profinet-enabled CPU devices with firmware before 3.2.12 and SIMATIC S7-300 Profinet-disabled CPU devices with firmware before 3.3.12 allow remote attackers to cause a denial of service (defect-mode transition) via crafted (1) ISO-TSAP or (2) Profibus packets.
Why it matters now
EPSS 0.04492 91st 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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:siemens:simatic_s7-300_with_profitnet_support_firmware:3.2.11:*:*:*:*:*:*:* | 3.2.11 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_s7-300_with_profitnet_support:*:*:*:*:*:*:*:* | all versions | Running on | Siemens |
| cpe:2.3:h:siemens:simatic_s7-300_without_profitnet_support:*:*:*:*:*:*:*:* | all versions | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_s7-300_without_profitnet_support_firmware:3.3.11:*:*:*:*:*:*:* | 3.3.11 | Vulnerable | Siemens |
- cpe:2.3:o:siemens:simatic_s7-300_with_profitnet_support_firmware:3.2.11:*:*:*:*:*:*:* Versions 3.2.11 Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_s7-300_with_profitnet_support:*:*:*:*:*:*:*:* Versions all versions Running on ·Siemens
- cpe:2.3:h:siemens:simatic_s7-300_without_profitnet_support:*:*:*:*:*:*:*:* Versions all versions Running on ·Siemens
- cpe:2.3:o:siemens:simatic_s7-300_without_profitnet_support_firmware:3.3.11:*:*:*:*:*:*:* Versions 3.3.11 Vulnerable ·Siemens
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2016-3949
- 2026-10-03 Alias added: GHSA-xx3r-7m7h-68q2
References
Sources
- CVE-2016-3949 · CVE Program
- CVE-2016-3949 · NVD
- FIRST EPSS
- GHSA-xx3r-7m7h-68q2 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences