CVE-2000-0551: The file transfer mechanism in Danware NetOp 6.0 does not provide authentication, which allows remote attacker

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HIGH 10.0DOWNGRADE

CVE-2000-0551 is a high-severity flaw (CVSS 10.0) affecting netop. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The file transfer mechanism in Danware NetOp 6.0 does not provide authentication, which allows remote attackers to access and modify arbitrary files.

Why this priority

Critical severity
EPSS top 9%: very likely to be exploited

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	4.3% (top 9%)
CISA exploited list	No
Published	2000-05-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: danware data

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2000-05-23 04:00 UTCPublished CVE record published
2026-06-16 21:51 UTCUpdated Record last modified

danware data netop DOWNGRADE

Affected: 6.0 · 6.50

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 6.0 (Debian / Ubuntu)

apt-cache madison netop sudo apt install netop=<VERSION_BEFORE_6.0> sudo apt-mark hold netop

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

dnf --showduplicates list netop sudo dnf downgrade netop-<VERSION_BEFORE_6.0> sudo dnf versionlock add netop

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-2000-0551?

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

Is CVE-2000-0551 being exploited?

CVE-2000-0551 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-2000-0551 affect?

CVE-2000-0551 affects netop. Severity is high (CVSS 10.0). The file transfer mechanism in Danware NetOp 6.0 does not provide authentication, which allows remote attackers to access and modify arbitrary files.

How urgent is CVE-2000-0551?

Priority 58/100. Critical severity; EPSS top 9%: very likely to be exploited

Related CVEs

CVE-2004-0950 MEDIUM 5.0 DOWNGRADE NetOp Host before 7.65 build 2004278 allows remote attackers to obtain sensitive hostname, username and local

References

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