CVE-2016-6393

highpriority · track · 32EPSS 0.046 · 92 %ileEUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
4.60% (92nd) EPSS
CVSS 7.1 · high
Is it mine?
15 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

The AAA service in Cisco IOS 12.0 through 12.4 and 15.0 through 15.6 and IOS XE 2.1 through 3.18 and 16.2 allows remote attackers to cause a denial of service (device reload) via a failed SSH connection attempt that is mishandled during generation of an error-log message, aka Bug ID CSCuy87667.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

  • MitigationAllen-Bradley ArmorStratix 5700 Industrial Managed Ethernet Switchescisa_csaf_ot

    Rockwell Automation encourages users using affected versions of these Stratix products to update to the latest available software versions addressing the associated risk, and including improvements to further harden the software and enhance its resilience against similar malicious attacks. Users can find the latest firmware version by selecting their device at the following web site: (http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15)

    http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15
  • MitigationAllen-Bradley Stratix 5400 Industrial Ethernet Switchescisa_csaf_ot

    Rockwell Automation encourages users using affected versions of these Stratix products to update to the latest available software versions addressing the associated risk, and including improvements to further harden the software and enhance its resilience against similar malicious attacks. Users can find the latest firmware version by selecting their device at the following web site: (http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15)

    http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15
  • MitigationAllen-Bradley Stratix 5410 Industrial Distribution Switchescisa_csaf_ot

    Rockwell Automation encourages users using affected versions of these Stratix products to update to the latest available software versions addressing the associated risk, and including improvements to further harden the software and enhance its resilience against similar malicious attacks. Users can find the latest firmware version by selecting their device at the following web site: (http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15)

    http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15
  • MitigationAllen-Bradley Stratix 5700 Industrial Managed Ethernet Switchescisa_csaf_ot

    Rockwell Automation encourages users using affected versions of these Stratix products to update to the latest available software versions addressing the associated risk, and including improvements to further harden the software and enhance its resilience against similar malicious attacks. Users can find the latest firmware version by selecting their device at the following web site: (http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15)

    http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15
  • MitigationAllen-Bradley Stratix 8000 Modular Managed Ethernet Switchescisa_csaf_ot

    Rockwell Automation encourages users using affected versions of these Stratix products to update to the latest available software versions addressing the associated risk, and including improvements to further harden the software and enhance its resilience against similar malicious attacks. Users can find the latest firmware version by selecting their device at the following web site: (http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15)

    http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15
02

cvss

Technical severity, 0–10. One row per scoring source.

8.6
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–8.6

v2.07.1highAV:N/AC:M/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 8.6 · impact 6.9
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6
v3.08.6highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · CISA US
v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-399USprimaryCWE-209US
04

affected products (15)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • ICSA-16-287-04Rockwell Automation Stratix Denial-of-Service and Memory Leak Vulnerabilities2016-07-17icsa · cisa_csaf_otUS

    This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcisa_csaf_otnvdNVDCVE.orgMITRE
published 2016-10-05modified 2026-06-17
09

references (13)

External citations — patches, advisories, analysis.

scry

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