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CVE-1999-0661

65
FAUCET Score

CVE-1999-0661 describes a critical vulnerability where legitimate software distributions were replaced with Trojan Horse versions, impacting products such as TCP Wrappers, util-linux, wu-ftpd, ircII, OpenSSH, and Sendmail. This vulnerability carries a CVSS score of 10.0 (Critical), indicating a network-exploitable flaw with low attack complexity, allowing for complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation in the wild or Metasploit/Nuclei modules, an exploit for the Sendmail 8.12.6 variant exists on ExploitDB, and the vulnerability has a high FAUCET Risk Score of 96/100. Despite its age and high severity, there is minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
N/AN/A
n/aCNA affected

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
54.24%
Probability of exploitation in next 30 days
EPSS Percentile
98.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-21919 · Oct 8, 2002
This CVE's current EPSS score of 0.5424 is in the 98th percentile among its peer group of 51,551 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

marc.info
marc.info
online.securityfocus.com / archive/1/294539
cert.org / advisories/CA-1994-07.html
US Government Resource
cert.org / advisories/CA-1994-14.html
US Government Resource
cert.org / advisories/CA-1999-01.html
US Government Resource
cert.org / advisories/CA-1999-02.html
US Government Resource
cert.org / advisories/CA-2002-28.html
US Government Resource
iss.net / security_center/static/10313.php
securityfocus.com / bid/5921