How severe is CVE-2016-6404?

CVE-2016-6404 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2016-6404 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6404?

CVE-2016-6404 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-6404?

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

When was CVE-2016-6404 published?

CVE-2016-6404 was published on 2016-09-18 and last updated on 2026-06-17.

CVE-2016-6404

CVE-2016-6404 is a medium-severity vulnerability in Cisco Ios with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Cisco Ios
Published: 2016-09-18
Last modified: 2026-06-17

Description

Cross-site scripting (XSS) vulnerability in the web framework in Cisco IOx Local Manager in IOS 15.5(2)T and IOS XE allows remote attackers to inject arbitrary web script or HTML via a crafted URL, aka Bug ID CSCuy19854.

Frequently asked questions

What is CVE-2016-6404?: Cross-site scripting (XSS) vulnerability in the web framework in Cisco IOx Local Manager in IOS 15.5(2)T and IOS XE allows remote attackers to inject arbitrary web script or HTML via a crafted URL, aka Bug ID CSCuy19854.
How severe is CVE-2016-6404?: CVE-2016-6404 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2016-6404 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6404?: CVE-2016-6404 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-6404?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-6404 published?: CVE-2016-6404 was published on 2016-09-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:cisco:ios:15.5\(2\)t:*:*:*:*:*:*:*

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