Firesight System SoftwareApplication · Cisco
CVE-2016-6395
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedCross-site scripting (XSS) vulnerability in the web-based management interface in Cisco Firepower Management Center before 6.1 and FireSIGHT System Software before 6.1 allows remote authenticated users to inject arbitrary web script or HTML via a crafted URL, aka Bug ID CSCuz58658.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceCross-site scripting (XSS) vulnerability in the web-based management interface of Cisco Firepower Management Center and FireSIGHT System Software. Authenticated remote users can inject arbitrary web script or HTML via a crafted URL, potentially allowing session hijacking or credential theft.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
Firesight System SoftwareApplication
= 5.1.0= 5.1.0.1= 5.1.0.2= 5.1.0.3= 5.1.1= 5.1.1.1= 5.1.1.2= 5.1.1.3= 5.1.1.4= 5.1.1.5= 5.1.1.6= 5.1.1.8CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the installed Cisco productAccess the web-based management interface or run 'show version' via CLI to confirm the product name is Cisco Firepower Management Center or FireSIGHT System SoftwareAffected if The product is not Cisco Firepower Management Center or FireSIGHT System Software (this CVE does not apply)
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Check the installed software versionIn the web interface, go to Help > About or run 'show version' via CLI to retrieve the exact software version numberAffected if The version matches 5.1.0, 5.1.0.1, 5.1.0.2, 5.1.0.3, 5.1.1, 5.1.1.1, 5.1.1.2, 5.1.1.3, 5.1.1.4, 5.1.1.5, 5.1.1.6, or 5.1.1.8
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Confirm the web-based management interface is enabledVerify that the web-based management interface (HTTPS/HTTP access to the management console) is accessible and actively used for administrationAffected if The web management interface is enabled and the version is in the affected list (both conditions required for exploitability)
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Review access logs for crafted URL patternsInspect web server access logs for suspicious URL parameters containing script tags (<script>, javascript:, onerror=, etc.) that may indicate XSS exploitation attemptsAffected if Unusual script injection patterns appear in the logs targeting the management interface
You are affected if the web-based management interface is enabled and the installed version is one of the specific 5.1.x versions listed (5.1.0 through 5.1.1.8).
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade to Cisco Firepower Management Center or FireSIGHT System Software version 6.1 or later to resolve the vulnerability.
Fix this in Firesight System Software
Scoped from the published advisory
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-6395 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2016-6395 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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