CVE-2012-0339

Name: CVE-2012-0339
Creator: NVD / NIST
Published: 2012-05-02T10:09:22.177+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.03%

Last modified Jun 16, 2026

CVE-2012-0339 is a vulnerability of currently unknown severity. Cisco IOS 12.2 through 12.4 and 15.0 does not recognize the vrf-also keyword during enforcement of access-class commands, which allows remote attackers to establish TELNET connections from arbitrary source IP addresses via a standard TELNET client, aka Bug ID CSCsi77774.. EPSS estimates a 1.03% chance of exploitation in the next 30 days.

Description

Cisco IOS 12.2 through 12.4 and 15.0 does not recognize the vrf-also keyword during enforcement of access-class commands, which allows remote attackers to establish TELNET connections from arbitrary source IP addresses via a standard TELNET client, aka Bug ID CSCsi77774.

Metrics

EPSS Probability

1.03%

59.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Cisco	Ios	12.2
Cisco	Ios	12.3
Cisco	Ios	12.4
Cisco	Ios	15.0

References

Timeline

Published: May 2, 2012
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2012-0339?

How severe is CVE-2012-0339?

Severity scoring for CVE-2012-0339 is pending analysis. The EPSS model estimates a 1.03% probability of exploitation in the next 30 days.

How do I fix CVE-2012-0339?

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-2012-0339?

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

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Source: NVD / NIST