CVE-2013-3959

Severity: medium (CVSS 4.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2013-06-14 · updated 2026-06-16
Weakness: CWE-200

Description

The Web Navigator in Siemens WinCC before 7.2 Update 1, as used in SIMATIC PCS7 8.0 SP1 and earlier and other products, exhibits different behavior for NetBIOS user names depending on whether the user account exists, which allows remote authenticated users to enumerate account names via crafted URL parameters.

Affected products

Siemens Simatic Pcs7: through 8.0; 8.0
Siemens SIMATIC WinCC: through 7.2; 7.0, 7.0-sp1, 7.0-sp2, 7.0-sp3, 7.1, 7.1-sp1

References

http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345843.pdf
http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345843.pdf

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