CVE-2000-0452: Buffer overflow in the ESMTP service of Lotus Domino Server 5.0.1 allows remote attackers to cause a denial of

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MEDIUM 5.0DOWNGRADEDOWNGRADE

CVE-2000-0452 is a medium-severity flaw (CVSS 5.0) affecting domino enterprise server, domino mail server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in the ESMTP service of Lotus Domino Server 5.0.1 allows remote attackers to cause a denial of service via a long MAIL FROM command.

Why this priority

EPSS top 5%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	7.7% (top 5%)
CISA exploited list	No
Published	2000-05-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: lotus

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

Am I affected?

Timeline

2000-05-18 04:00 UTCPublished CVE record published
2026-06-16 21:51 UTCUpdated Record last modified

lotus domino enterprise server DOWNGRADE

Affected: 5.0.1 · 5.0.2 · 5.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0.1

1. Check installed version

apt-cache policy domino-enterprise-server || rpm -q domino-enterprise-server || domino-enterprise-server --version

2. No fixed release: DOWNGRADE to a release before 5.0.1 (Debian / Ubuntu)

apt-cache madison domino-enterprise-server sudo apt install domino-enterprise-server=<VERSION_BEFORE_5.0.1> sudo apt-mark hold domino-enterprise-server

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

dnf --showduplicates list domino-enterprise-server sudo dnf downgrade domino-enterprise-server-<VERSION_BEFORE_5.0.1> sudo dnf versionlock add domino-enterprise-server

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.

lotus domino mail server DOWNGRADE

Affected: 5.0.1 · 5.0.2 · 5.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0.1

1. Check installed version

apt-cache policy domino-mail-server || rpm -q domino-mail-server || domino-mail-server --version

2. No fixed release: DOWNGRADE to a release before 5.0.1 (Debian / Ubuntu)

apt-cache madison domino-mail-server sudo apt install domino-mail-server=<VERSION_BEFORE_5.0.1> sudo apt-mark hold domino-mail-server

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

dnf --showduplicates list domino-mail-server sudo dnf downgrade domino-mail-server-<VERSION_BEFORE_5.0.1> sudo dnf versionlock add domino-mail-server

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Lotus Domino Enterprise Server 5.0.1/5.0.2/5.0.3 / Mail Server 5.0.1/5.0.2/5.0.3 - Remote Buffer Overflow

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-2000-0452?

domino enterprise server: downgrade or apply the listed mitigation; domino mail server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2000-0452 being exploited?

CVE-2000-0452 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-2000-0452 affect?

CVE-2000-0452 affects domino enterprise server, domino mail server. Severity is medium (CVSS 5.0). Buffer overflow in the ESMTP service of Lotus Domino Server 5.0.1 allows remote attackers to cause a denial of service via a long MAIL FROM command.

How urgent is CVE-2000-0452?

Priority 46/100. EPSS top 5%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2000-1047 HIGH 10.0 DOWNGRADE DOWNGRADE Buffer overflow in SMTP service of Lotus Domino 5.0.4 and earlier allows remote attackers to cause a denial of

References

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