CVE-2016-3400: NetApp Data ONTAP 8.1 and 8.2, when operating in 7-Mode, allows man-in-the-middle attackers to obtain sensitiv

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HIGH 7.5DOWNGRADE

CVE-2016-3400 is a high-severity flaw (CVSS 7.5) affecting data ontap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NetApp Data ONTAP 8.1 and 8.2, when operating in 7-Mode, allows man-in-the-middle attackers to obtain sensitive information, gain privileges, or cause a denial of service via vectors related to the SMB protocol.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-254
Published	2017-07-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: netapp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-07-03 16:29 UTCPublished CVE record published
2026-06-17 00:45 UTCUpdated Record last modified

netapp data ontap DOWNGRADE

Affected: 8.1 · 8.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.1

1. Check installed version

apt-cache policy data-ontap || rpm -q data-ontap || data-ontap --version

2. No fixed release: DOWNGRADE to a release before 8.1 (Debian / Ubuntu)

apt-cache madison data-ontap sudo apt install data-ontap=<VERSION_BEFORE_8.1> sudo apt-mark hold data-ontap

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list data-ontap sudo dnf downgrade data-ontap-<VERSION_BEFORE_8.1> sudo dnf versionlock add data-ontap

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2016-3400?

data ontap: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2016-3400 being exploited?

CVE-2016-3400 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2016-3400 affect?

CVE-2016-3400 affects data ontap. Severity is high (CVSS 7.5). NetApp Data ONTAP 8.1 and 8.2, when operating in 7-Mode, allows man-in-the-middle attackers to obtain sensitive information, gain privileges, or cause a denial of service via vectors related to the SMB protocol.

How urgent is CVE-2016-3400?

Priority 45/100. High severity

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References

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