CVE-2013-6920
UnknownEPSS 3.23%
Last modified
CVE-2013-6920 is a vulnerability of currently unknown severity. Siemens SINAMICS S/G controllers with firmware before 4.6.11 do not require authentication for FTP and TELNET sessions, which allows remote attackers to bypass intended access restrictions via TCP traffic to port (1) 21 or (2) 23.. EPSS estimates a 3.23% chance of exploitation in the next 30 days.
Description
Siemens SINAMICS S/G controllers with firmware before 4.6.11 do not require authentication for FTP and TELNET sessions, which allows remote attackers to bypass intended access restrictions via TCP traffic to port (1) 21 or (2) 23.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Siemens | Sinamics S\/G Family Firmware | <= 4.6 |
| Siemens | Sinamics G110 | All versions |
| Siemens | Sinamics G110d | All versions |
| Siemens | Sinamics G120 | All versions |
| Siemens | Sinamics G120c | All versions |
| Siemens | Sinamics G120d | All versions |
| Siemens | Sinamics G120p | All versions |
| Siemens | Sinamics G130 | All versions |
| Siemens | Sinamics G150 | All versions |
| Siemens | Sinamics G180 | All versions |
| Siemens | Sinamics S110 | All versions |
| Siemens | Sinamics S120 | All versions |
| Siemens | Sinamics S120cm | All versions |
| Siemens | Sinamics S150 | All versions |
References
- http://ics-cert.us-cert.gov/advisories/ICSA-13-338-01US Government Resource
- http://ics-cert.us-cert.gov/advisories/ICSA-13-338-01US Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2013-6920?
Siemens SINAMICS S/G controllers with firmware before 4.6.11 do not require authentication for FTP and TELNET sessions, which allows remote attackers to bypass intended access restrictions via TCP traffic to port (1) 21 or (2) 23.
How severe is CVE-2013-6920?
Severity scoring for CVE-2013-6920 is pending analysis. The EPSS model estimates a 3.23% probability of exploitation in the next 30 days.
How do I fix CVE-2013-6920?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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Are you affected by CVE-2013-6920?
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Scan your code nowSource: NVD / NIST