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CVE-2013-6920

29
FAUCET Score

CVE-2013-6920 describes a critical authentication bypass vulnerability in Siemens SINAMICS S/G controllers with firmware versions prior to 4.6.11, allowing remote attackers to gain unauthorized access via unauthenticated FTP and TELNET sessions. With a CVSS score of 10.0, this flaw presents a severe risk due to its network-based attack vector, low attack complexity, and complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.6CPE matchmatch criteria
cpe:2.3:o:siemens:sinamics_s\/g_family_firmware:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:siemens:sinamics_g110:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:siemens:sinamics_g110d:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:siemens:sinamics_g120:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:siemens:sinamics_g120c:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.23%
Probability of exploitation in next 30 days
EPSS Percentile
87.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0323 is in the 77th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ics-cert.us-cert.gov / advisories/ICSA-13-338-01
US Government Resource
cert-portal.siemens.com / productcert/pdf/ssa-742938.pdf
siemens.com / innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-742938.pdf
Vendor Advisory