How severe is CVE-2016-6411?

CVE-2016-6411 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 high, and availability none.

Is CVE-2016-6411 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6411?

CVE-2016-6411 affects Cisco Firesight System Software. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-6411?

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-2016-6411 published?

CVE-2016-6411 was published on 2016-09-24 and last updated on 2026-06-17.

CVE-2016-6411

CVE-2016-6411 is a high-severity vulnerability in Cisco Firesight System Software 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Firesight System Software
Published: 2016-09-24
Last modified: 2026-06-17

Description

Cisco Firepower Management Center and FireSIGHT System Software 6.0.1 mishandle comparisons between URLs and X.509 certificates, which allows remote attackers to bypass intended do-not-decrypt settings via a crafted URL, aka Bug ID CSCva50585.

Frequently asked questions

What is CVE-2016-6411?: Cisco Firepower Management Center and FireSIGHT System Software 6.0.1 mishandle comparisons between URLs and X.509 certificates, which allows remote attackers to bypass intended do-not-decrypt settings via a crafted URL, aka Bug ID CSCva50585.
How severe is CVE-2016-6411?: CVE-2016-6411 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 high, and availability none.
Is CVE-2016-6411 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6411?: CVE-2016-6411 affects Cisco Firesight System Software. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-6411?: 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-2016-6411 published?: CVE-2016-6411 was published on 2016-09-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cisco:firesight_system_software:6.0.1:*:*:*:*:*:*:*

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