CVE-2013-3959

Name: CVE-2013-3959
Creator: NVD / NIST
Published: 2013-06-14T19:55:01.27+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.33%

Last modified Jun 16, 2026

CVE-2013-3959 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.33% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.33%

67.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions	Update
Siemens	Simatic Pcs7	<= 8.0	Sp1
Siemens	Simatic Pcs7	8.0	—
Siemens	Wincc	<= 7.2	—
Siemens	Wincc	7.0	—
Siemens	Wincc	7.1	—

References

Timeline

Published: Jun 14, 2013
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2013-3959?

How severe is CVE-2013-3959?

Severity scoring for CVE-2013-3959 is pending analysis. The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.

How do I fix CVE-2013-3959?

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.

Are you affected by CVE-2013-3959?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST