CVE-2019-19747: NeuVector 3.1 when configured to allow authentication via Active Directory, does not enforce non-empty passwor

Q: How do I fix CVE-2019-19747?

neuvector: upgrade to newer than 3.1. Exact commands for each OS are on this page.

Q: Is CVE-2019-19747 being exploited?

CVE-2019-19747 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-19747 affect?

CVE-2019-19747 affects neuvector. Severity is critical (CVSS 9.8). NeuVector 3.1 when configured to allow authentication via Active Directory, does not enforce non-empty passwords which allows an attacker with access to the Neuvector portal to authenticate as any valid LDAP user by providing a valid userna

Q: How urgent is CVE-2019-19747?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2019-19747 is a critical-severity flaw (CVSS 9.8) affecting neuvector. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NeuVector 3.1 when configured to allow authentication via Active Directory, does not enforce non-empty passwords which allows an attacker with access to the Neuvector portal to authenticate as any valid LDAP user by providing a valid username and an empty password (provided that the active directory server has not been configured to reject empty passwords).

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-521
Published	2019-12-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: neuvector

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

Am I affected?

Timeline

2019-12-20 17:15 UTCPublished CVE record published
2026-06-17 02:27 UTCUpdated Record last modified

neuvector neuvector UPGRADE

Affected: <= 3.1

Fixed in: newer than 3.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy neuvector || rpm -q neuvector || neuvector --version

2. UPGRADE to newer than 3.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade neuvector

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade neuvector

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2019-19747?

neuvector: upgrade to newer than 3.1. Exact commands for each OS are on this page.

Is CVE-2019-19747 being exploited?

CVE-2019-19747 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-2019-19747 affect?

CVE-2019-19747 affects neuvector. Severity is critical (CVSS 9.8). NeuVector 3.1 when configured to allow authentication via Active Directory, does not enforce non-empty passwords which allows an attacker with access to the Neuvector portal to authenticate as any valid LDAP user by providing a valid userna

How urgent is CVE-2019-19747?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Active Directory vulnerabilities

References

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