CVE-2014-3309

Name: CVE-2014-3309
Creator: NVD / NIST
Published: 2014-07-09T11:07:01.447+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.11%

Last modified Jun 17, 2026

CVE-2014-3309 is a vulnerability of currently unknown severity. The NTP implementation in Cisco IOS and IOS XE does not properly support use of the access-group command for a "deny all" configuration, which allows remote attackers to bypass intended restrictions on time synchronization via a standard query, aka Bug ID CSCuj66318.. EPSS estimates a 2.11% chance of exploitation in the next 30 days.

Description

The NTP implementation in Cisco IOS and IOS XE does not properly support use of the access-group command for a "deny all" configuration, which allows remote attackers to bypass intended restrictions on time synchronization via a standard query, aka Bug ID CSCuj66318.

Metrics

EPSS Probability

2.11%

79.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-264

Affected Software

Vendor	Product	Versions
Cisco	Ios	All versions
Cisco	Ios Xe	All versions

References

Timeline

Published: Jul 9, 2014
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2014-3309?

How severe is CVE-2014-3309?

Severity scoring for CVE-2014-3309 is pending analysis. The EPSS model estimates a 2.11% probability of exploitation in the next 30 days.

How do I fix CVE-2014-3309?

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-2014-3309?

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

Scan your code now

Source: NVD / NIST