How severe is CVE-2014-3309?

CVE-2014-3309 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2014-3309 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-3309?

CVE-2014-3309 primarily affects Cisco Ios. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-3309?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2014-3309 published?

CVE-2014-3309 was published on 2014-07-09 and last updated on 2026-06-17.

CVE-2014-3309

CVE-2014-3309 is a medium-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Cisco Ios
Published: 2014-07-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2014-3309?: 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.
How severe is CVE-2014-3309?: CVE-2014-3309 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2014-3309 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-3309?: CVE-2014-3309 primarily affects Cisco Ios. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-3309?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-3309 published?: CVE-2014-3309 was published on 2014-07-09 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:cisco:ios:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:-:*:*:*:*:*:*:*

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