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CVE-2013-5709

23
FAUCET Score

CVE-2013-5709 describes a critical vulnerability in the authentication implementation of Siemens SCALANCE X-200 series switches with firmware older than 5.0.0. The flaw stems from insufficient entropy in random number generation, making session hijacking feasible for remote attackers. With a CVSS score of 8.3, this vulnerability is highly severe, allowing unauthenticated remote attackers to compromise confidentiality, integrity, and availability with moderate attack complexity. Despite its age and high severity, there is no public exploit code available (Metasploit, Nuclei, ExploitDB), and it is not listed in CISA's KEV catalog, suggesting it is not actively exploited. However, it has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.4CPE matchmatch criteria
cpe:2.3:o:siemens:scalance_x-200_series_firmware:*:*:*:*:*:*:*:*
4.3CPE matchmatch criteria
cpe:2.3:o:siemens:scalance_x-200_series_firmware:4.3:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:siemens:scalance_x-200:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:siemens:scalance_x-200rna:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:siemens:scalance_x200-4p_irt:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

8.3HIGH

AV:N/AC:M/Au:N/C:P/I:P/A:C

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
8.5
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.99%
Probability of exploitation in next 30 days
EPSS Percentile
85.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0299 is in the 44th percentile among its peer group of 8,918 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

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-13-254-01
US Government Resource
cert-portal.siemens.com / productcert/pdf/ssa-850708.pdf
siemens.com / corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-850708.pdf
Vendor Advisory