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Firesight System SoftwareApplication · Cisco

CVE-2016-1394

HIGH · 8.6 CVSS v3.0 Published 2016-07-03
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
95/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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 · unedited
Cisco Firepower System Software 6.0.0 through 6.1.0 has a hardcoded account, which allows remote attackers to obtain CLI access by leveraging knowledge of the password, aka Bug ID CSCuz56238.

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 confidence

Cisco Firepower System Software versions 6.0.0 through 6.1.0 contains a hardcoded account with a known password. Remote attackers who possess knowledge of this password can authenticate to the affected system and obtain CLI access, potentially granting full administrative capabilities over the Firepower appliance.

MitigationUpdate Cisco Firepower System Software to a version beyond 6.1.0 that addresses this vulnerability. Additionally, identify and disable the hardcoded account, review system logs for unauthorized access, and change any credentials that may have been exposed.

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
Affected:= 6.0.0= 6.0.0.1= 6.0.1= 6.1.0

CVSS 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
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify the installed Cisco Firepower System Software version
    Run the command 'show version' on the Firepower CLI or access the version information through the management interface
    Affected if The installed version is 6.0.0, 6.0.0.1, 6.0.1, or 6.1.0 (within the 6.0.0 through 6.1.0 range)
  2. Locate all local user accounts configured on the system
    Use the CLI command 'show user' or access the user management section of the Firepower management interface to list all configured accounts
    Affected if An unexpected or undocumented local user account exists in addition to legitimate administrator accounts
  3. Verify if the hardcoded account is present and active
    Cross-reference all enumerated local accounts against known documentation; if an account exists that was not created by your organization, it may be the hardcoded account
    Affected if A user account exists that was not explicitly created by your organization's administrators
  4. Review authentication logs for suspicious activity
    Examine system logs using 'show logs' or the management interface for authentication events, focusing on logins from unexpected IP addresses or at unusual times
    Affected if There are successful authentication events from unknown sources or at times your organization does not use the system
  5. Check for unauthorized CLI administrative sessions
    Review active sessions using 'show sessions' or similar commands to identify any administrative sessions not initiated by your team
    Affected if Active or recent administrative sessions exist that your organization does not recognize

The environment is affected if the installed Cisco Firepower System Software version falls within 6.0.0 through 6.1.0 and the undocumented hardcoded account is present on the system.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update Cisco Firepower System Software to a version beyond 6.1.0 that addresses this vulnerability. Additionally, identify and disable the hardcoded account, review system logs for unauthorized access, and change any credentials that may have been exposed.

Fix this in Firesight System Software Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,980
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2016-1394 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data