How severe is CVE-2016-6409?

CVE-2016-6409 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-6409 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6409?

CVE-2016-6409 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-6409?

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-2016-6409 published?

CVE-2016-6409 was published on 2016-09-24 and last updated on 2026-06-17.

CVE-2016-6409

CVE-2016-6409 is a high-severity vulnerability in Cisco Ios with a CVSS 3.x base score of 7.5. 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-399.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Ios
Published: 2016-09-24
Last modified: 2026-06-17

Description

The Data in Motion (DMo) component in Cisco IOS 15.6(1)T and IOS XE, when the IOx feature set is enabled, allows remote attackers to cause a denial of service (out-of-bounds access) via crafted traffic, aka Bug ID CSCuy54015.

Frequently asked questions

What is CVE-2016-6409?: The Data in Motion (DMo) component in Cisco IOS 15.6(1)T and IOS XE, when the IOx feature set is enabled, allows remote attackers to cause a denial of service (out-of-bounds access) via crafted traffic, aka Bug ID CSCuy54015.
How severe is CVE-2016-6409?: CVE-2016-6409 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-6409 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6409?: CVE-2016-6409 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-6409?: 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-2016-6409 published?: CVE-2016-6409 was published on 2016-09-24 and last updated on 2026-06-17.

References

Affected products (1)

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

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