How severe is CVE-2016-6414?

CVE-2016-6414 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-6414 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6414?

CVE-2016-6414 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-6414?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-6414 published?

CVE-2016-6414 was published on 2016-09-22 and last updated on 2026-06-17.

CVE-2016-6414

CVE-2016-6414 is a high-severity vulnerability in Cisco Ios with a CVSS 3.x base score of 7.8. 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Cisco Ios
Published: 2016-09-22
Last modified: 2026-06-17

Description

iox in Cisco IOS, possibly 15.6 and earlier, and IOS XE, possibly 3.18 and earlier, allows local users to execute arbitrary IOx Linux commands on the guest OS via crafted iox command-line options, aka Bug ID CSCuz59223.

Frequently asked questions

What is CVE-2016-6414?: iox in Cisco IOS, possibly 15.6 and earlier, and IOS XE, possibly 3.18 and earlier, allows local users to execute arbitrary IOx Linux commands on the guest OS via crafted iox command-line options, aka Bug ID CSCuz59223.
How severe is CVE-2016-6414?: CVE-2016-6414 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-6414 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6414?: CVE-2016-6414 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-6414?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-6414 published?: CVE-2016-6414 was published on 2016-09-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:cisco:ios:15.6\(1\)t1:*:*:*:*:*:*:*

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