How severe is CVE-2015-6374?

CVE-2015-6374 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-6374 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6374?

CVE-2015-6374 affects Cisco Firepower Extensible Operating System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-6374?

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

When was CVE-2015-6374 published?

CVE-2015-6374 was published on 2015-11-19 and last updated on 2026-06-17.

CVE-2015-6374

CVE-2015-6374 is a medium-severity vulnerability in Cisco Firepower Extensible Operating System with a CVSS 2.0 base score of 4.3. 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: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Firepower Extensible Operating System
Published: 2015-11-19
Last modified: 2026-06-17

Description

The web interface in Cisco Firepower Extensible Operating System 1.1(1.160) on Firepower 9000 devices does not properly restrict use of IFRAME elements, which makes it easier for remote attackers to conduct clickjacking attacks and unspecified other attacks via a crafted web site, aka Bug ID CSCux10604.

Frequently asked questions

What is CVE-2015-6374?: The web interface in Cisco Firepower Extensible Operating System 1.1(1.160) on Firepower 9000 devices does not properly restrict use of IFRAME elements, which makes it easier for remote attackers to conduct clickjacking attacks and unspecified other attacks via a crafted web site, aka Bug ID CSCux10604.
How severe is CVE-2015-6374?: CVE-2015-6374 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-6374 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6374?: CVE-2015-6374 affects Cisco Firepower Extensible Operating System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-6374?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-6374 published?: CVE-2015-6374 was published on 2015-11-19 and last updated on 2026-06-17.

References

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151117-firepower4

Affected products (1)

cpe:2.3:o:cisco:firepower_extensible_operating_system:1.1\(1.160\):*:*:*:*:*:*:*

More vulnerabilities in Cisco Firepower Extensible Operating System

CVE-2018-0310 — Critical (CVSS 9.8): A vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an…
CVE-2015-6435 — Critical (CVSS 9.8): An unspecified CGI script in Cisco FX-OS before 1.1.2 on Firepower 9000 devices and Cisco Unified Computing System…
CVE-2021-1368 — High (CVSS 8.8): A vulnerability in the Unidirectional Link Detection (UDLD) feature of Cisco FXOS Software and Cisco NX-OS Software…
CVE-2020-3456 — High (CVSS 8.8): A vulnerability in the Cisco Firepower Chassis Manager (FCM) of Cisco FXOS Software could allow an unauthenticated,…
CVE-2020-3172 — High (CVSS 8.8): A vulnerability in the Cisco Discovery Protocol feature of Cisco FXOS Software and Cisco NX-OS Software could allow an…
CVE-2018-0395 — High (CVSS 8.8): A vulnerability in the Link Layer Discovery Protocol (LLDP) implementation for Cisco FXOS Software and Cisco NX-OS…

All CVEs affecting Cisco Firepower Extensible Operating System →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →