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CVE-2000-0833

39
FAUCET Score

CVE-2000-0833 describes a critical buffer overflow vulnerability in Jack De Winter WinSMTP versions 1.06f and 2.X. This flaw allows unauthenticated remote attackers to trigger a denial of service by sending excessively long USER or HELO commands. With a CVSS score of 10.0 (HIGH), the vulnerability is easily exploitable over the network with low attack complexity, leading to complete compromise of confidentiality, integrity, and availability. While not listed in CISA's KEV catalog, an exploit is publicly available on ExploitDB, though there is no evidence of widespread active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
1.6fCPE matchmatch criteria
cpe:2.3:a:jack_de_winter:winsmtp:1.6f:*:*:*:*:*:*:*
2.xCPE matchmatch criteria
cpe:2.3:a:jack_de_winter:winsmtp:2.x:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

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

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

Exploit Intelligence

EPSS Score
10.42%
Probability of exploitation in next 30 days
EPSS Percentile
95.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-20221 · Sep 11, 2000
This CVE's current EPSS score of 0.1042 is in the 93rd percentile among its peer group of 51,466 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/5255
securityfocus.com / archive/1/81693
securityfocus.com / bid/1680
ExploitVendor Advisory