CVE-2012-3946

Name: CVE-2012-3946
Creator: NVD / NIST
Published: 2014-04-24T10:55:02.29+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.88%

Last modified Jun 16, 2026

CVE-2012-3946 is a vulnerability of currently unknown severity. Cisco IOS before 15.3(2)S allows remote attackers to bypass interface ACL restrictions in opportunistic circumstances by sending IPv6 packets in an unspecified scenario in which expected packet drops do not occur for "a small percentage" of the packets, aka Bug ID CSCty73682.. EPSS estimates a 1.88% chance of exploitation in the next 30 days.

Description

Cisco IOS before 15.3(2)S allows remote attackers to bypass interface ACL restrictions in opportunistic circumstances by sending IPv6 packets in an unspecified scenario in which expected packet drops do not occur for "a small percentage" of the packets, aka Bug ID CSCty73682.

Metrics

EPSS Probability

1.88%

76.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-264

Affected Software

Vendor	Product	Versions
Cisco	Ios	<= 15.3

References

Timeline

Published: Apr 24, 2014
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2012-3946?

How severe is CVE-2012-3946?

Severity scoring for CVE-2012-3946 is pending analysis. The EPSS model estimates a 1.88% probability of exploitation in the next 30 days.

How do I fix CVE-2012-3946?

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-2012-3946?

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

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Source: NVD / NIST