CVE-2000-0859: The web configuration server for NTMail V5 and V6 allows remote attackers to cause a denial of service via a s

Routine

MEDIUM 5.0DOWNGRADE

CVE-2000-0859 is a medium-severity flaw (CVSS 5.0) affecting ntmail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The web configuration server for NTMail V5 and V6 allows remote attackers to cause a denial of service via a series of partial HTTP requests.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Published	2000-11-14
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: gordano

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

Am I affected?

Timeline

2000-11-14 05:00 UTCPublished CVE record published
2026-06-16 21:52 UTCUpdated Record last modified

gordano ntmail DOWNGRADE

Affected: 5.0 · 6.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.0 (Debian / Ubuntu)

apt-cache madison ntmail sudo apt install ntmail=<VERSION_BEFORE_5.0> sudo apt-mark hold ntmail

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

dnf --showduplicates list ntmail sudo dnf downgrade ntmail-<VERSION_BEFORE_5.0> sudo dnf versionlock add ntmail

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-2000-0859?

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

Is CVE-2000-0859 being exploited?

CVE-2000-0859 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-2000-0859 affect?

CVE-2000-0859 affects ntmail. Severity is medium (CVSS 5.0). The web configuration server for NTMail V5 and V6 allows remote attackers to cause a denial of service via a series of partial HTTP requests.

How urgent is CVE-2000-0859?

Priority 39/100. No elevated risk signals yet.

Related CVEs

CVE-2002-2408 HIGH 7.5 DOWNGRADE Gordano Messaging Server (GMS) Mail 8 (a.k.a
CVE-2001-0585 MEDIUM 5.0 DOWNGRADE Gordano NTMail 6.0.3c allows a remote attacker to create a denial of service via a long (>= 255 characters) UR
CVE-1999-0927 MEDIUM 5.0 DOWNGRADE NTMail allows remote attackers to read arbitrary files via a .

References

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