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Ios XeOperating system · Cisco

CVE-2016-1432

MEDIUM · 6.5 CVSS v3.0 Published 2016-06-18
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable 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 IOS XE 3.15S and 3.16S on cBR-8 Converged Broadband Router devices allows remote authenticated users to cause a denial of service (NULL pointer dereference and card restart) via a crafted SNMP request, aka Bug ID CSCuu68862.

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

Remote authenticated attackers can send crafted SNMP packets to affected Cisco cBR-8 routers running IOS XE 3.15S or 3.16S, triggering a NULL pointer dereference that causes the line card to restart, resulting in denial of service.

MitigationApply Cisco patches for CSCuu68862 or upgrade to a patched IOS XE version; additionally, restrict SNMP access to trusted management networks and use SNMPv3 with authentication as a defense-in-depth measure.

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
Ios XeOperating system
Affected:= 3.15.0s= 3.15.1s= 3.16.0s

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

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 device model
    Run 'show version' or 'show platform' command and look for cBR-8 in the output
    Affected if Device is not a Cisco cBR-8 router
  2. Check the IOS XE version
    Run 'show version' and locate the IOS XE software version string (typically shows as 3.15.xs or 3.16.xs)
    Affected if Version is exactly 3.15.0s, 3.15.1s, or 3.16.0s
  3. Verify if SNMP is enabled
    Run 'show snmp' or check configuration with 'show running-config | include snmp'
    Affected if SNMP is enabled (any version: v1, v2c, or v3)
  4. Check SNMP access control
    Run 'show snmp community' or review SNMP configuration for access lists restricting which hosts can send SNMP packets
    Affected if SNMP is accessible from untrusted or management networks

You are affected if you have a Cisco cBR-8 router running IOS XE version 3.15.0s, 3.15.1s, or 3.16.0s with SNMP enabled and accessible to untrusted attackers.

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

Apply Cisco patches for CSCuu68862 or upgrade to a patched IOS XE version; additionally, restrict SNMP access to trusted management networks and use SNMPv3 with authentication as a defense-in-depth measure.

Fix this in Ios Xe Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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Scan for this in your stack

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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-2016-1432 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
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