iOSOperating system · Cisco
CVE-2016-6410
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 · uneditedThe Cisco Application-hosting Framework (CAF) component in Cisco IOS 15.6(1)T1 and IOS XE, when the IOx feature set is enabled, allows remote authenticated users to read arbitrary files via unspecified vectors, aka Bug ID CSCuy19856.
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 · moderate confidenceThe Cisco Application-hosting Framework (CAF) component in IOS 15.6(1)T1 and IOS XE contains a file read vulnerability when the IOx feature is enabled. A remote authenticated user can read arbitrary files on the underlying system by exploiting unspecified vectors in the CAF component, potentially exposing sensitive configuration files, credentials, or system data.
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
iOSOperating system
= 15.5\(2\)tCVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 Cisco iOS versionRun 'show version' or 'show version | include IOS' on the device CLI to obtain the installed iOS version number.Affected if The version matches 15.5(2)T, 15.6(1)T1, or falls within the IOS XE versions that correspond to these iOS releases.
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Confirm IOx feature is enabledRun 'show iox' or 'show running-config | include iox' to check whether the IOx feature is currently active on the device.Affected if IOx is listed as enabled or the configuration contains 'iox' statements.
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Review CAF service statusRun 'show app-hosting resources' or 'show process cpu | include caf' to check if the Cisco Application-hosting Framework process is running.Affected if The CAF process is active and consuming resources.
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Inspect for unauthorized file accessCheck log files under /var/log or the device's flash memory for unusual CAF-related file read operations. Run 'show logging | include CAF' or review any external syslog messages referencing the CAF component.Affected if Logs contain unexpected file read attempts, access to sensitive paths (such as configuration files or credential stores), or operations from unfamiliar authenticated sessions.
The device is affected if it runs a vulnerable iOS version (15.5(2)T, 15.6(1)T1, or equivalent IOS XE) AND has the IOx feature enabled, making the CAF component accessible for authenticated file read exploitation.
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 dataDisable the IOx feature if not required, or apply the Cisco patch for Bug ID CSCuy19856. Restrict administrative access to trusted personnel only, as this vulnerability requires authentication to exploit.
Fix this in iOS
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-6410 — 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-2016-6410 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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