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CVE Record

CVE-2018-0254: A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated,...

A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass configured file action policies if an Intelligent Application Bypass (IAB) with a drop percentage threshold is also configured. The vulnerability is due to incorrect counting of the percentage of dropped traffic. An attacker could exploit this vulnerability by sending network traffic to a targeted device. An exploit could allow the attacker to bypass configured file action policies, and traffic that should be dropped could be allowed into the network. Cisco Bug IDs: CSCvf86435.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

Under a specific Cisco Firepower configuration, traffic that should be blocked by file action policies may be allowed through. The issue depends on Intelligent Application Bypass using a drop percentage threshold, so exposure is configuration-specific rather than universal. Organizations are likely exposed only if they run Cisco Firepower System Software with file action policies and Intelligent Application Bypass configured with a drop percentage threshold. Treat this as a targeted but meaningful control-bypass risk. Prioritize environments where Firepower is expected to stop malicious files or enforce segmentation-sensitive inspection. Mitigation focus: Review Cisco advisory cisco-sa-20180418-fss2 for affected releases and fixed software guidance.; Check whether Intelligent Application Bypass uses a drop percentage threshold.; Review file action policies on affected Firepower deployments..

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Potential ATT&CK relevance

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CVE-2018-0254 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aCisco Firepower System SoftwareCisco Firepower System SoftwareListed
Weakness

CWE details

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CWE-693 · source CWE mapping

Protection Mechanism Failure

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