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CVE-2000-1203

17
FAUCET Score

CVE-2000-1203 describes a denial-of-service vulnerability affecting Lotus Domino SMTP servers versions 4.63 through 5.08. An attacker can exploit this by sending a specially crafted email with a forged sender address (bounce@[127.0.0.1]), causing the server to enter a mail loop and consume excessive CPU resources. Rated as Medium severity (CVSS 5.0), this vulnerability requires no authentication and can be exploited remotely with low complexity, leading to system unavailability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.6.1CPE matchmatch criteria
cpe:2.3:a:lotus:domino:4.6.1:*:*:*:*:*:*:*
4.6.3CPE matchmatch criteria
cpe:2.3:a:lotus:domino:4.6.3:*:*:*:*:*:*:*
4.6.4CPE matchmatch criteria
cpe:2.3:a:lotus:domino:4.6.4:*:*:*:*:*:*:*
5.0.1CPE matchmatch criteria
cpe:2.3:a:lotus:domino:5.0.1:*:*:*:*:*:*:*
5.0.2CPE matchmatch criteria
cpe:2.3:a:lotus:domino:5.0.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.47%
Probability of exploitation in next 30 days
EPSS Percentile
82.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0247 is in the 74th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

marc.info
exchange.xforce.ibmcloud.com / vulnerabilities/7012
securityfocus.com / archive/1/209754
securityfocus.com / bid/3212
PatchVendor Advisory
securityfocus.com / cgi-bin/archive.pl