CVE-2000-1046: Multiple buffer overflows in the ESMTP service of Lotus Domino 5.0.2c and earlier allow remote attackers to ca

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HIGH 10.0DOWNGRADE

CVE-2000-1046 is a high-severity flaw (CVSS 10.0) affecting domino. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple buffer overflows in the ESMTP service of Lotus Domino 5.0.2c and earlier allow remote attackers to cause a denial of service and possibly execute arbitrary code via long (1) "RCPT TO," (2) "SAML FROM," or (3) "SOML FROM" commands.

Why this priority

Critical severity
EPSS top 7%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	6.1% (top 7%)
CISA exploited list	No
Published	2000-12-11
Last modified	2026-09-23

Publisher (CNA): MITRE · Vendor: lotus

Last updated 2026-09-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2000-12-11 05:00 UTCPublished CVE record published
2026-09-23 13:10 UTCUpdated Record last modified

lotus domino DOWNGRADE

Affected: 5.0.2a · 5.0.2c

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0.2a

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.0.2a (Debian / Ubuntu)

apt-cache madison domino sudo apt install domino=<VERSION_BEFORE_5.0.2a> sudo apt-mark hold domino

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

dnf --showduplicates list domino sudo dnf downgrade domino-<VERSION_BEFORE_5.0.2a> sudo dnf versionlock add domino

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-2000-1046?

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

Is CVE-2000-1046 being exploited?

CVE-2000-1046 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-2000-1046 affect?

CVE-2000-1046 affects domino. Severity is high (CVSS 10.0). Multiple buffer overflows in the ESMTP service of Lotus Domino 5.0.2c and earlier allow remote attackers to cause a denial of service and possibly execute arbitrary code via long (1) "RCPT TO," (2) "SAML FROM," or (3) "SOML FROM" commands.

How urgent is CVE-2000-1046?

Priority 63/100. Critical severity; EPSS top 7%: very likely to be exploited; Public exploit reference

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CVE-2023-28010 MEDIUM 4.0 DOWNGRADE In some configuration scenarios, the Domino server host name can be exposed
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References

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