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CVE-1999-1555

27
FAUCET Score

CVE-1999-1555 describes a critical vulnerability in Cheyenne InocuLAN Anti-Virus Server 4.0 prior to Service Pack 2, where an update directory is created with "EVERYONE FULL CONTROL" permissions. This flaw allows local users to install a malicious DLL, effectively enabling a Trojan horse through the antivirus update mechanism. With a CVSS score of 7.2 (HIGH) and a FAUCET Risk Score of 86/100, the vulnerability presents a significant risk due to its low attack complexity (AV:L/AC:L) and complete compromise potential (C:C/I:C/A:C). While no active exploitation or Metasploit/Nuclei modules are noted, an ExploitDB entry exists, and there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.0CPE matchmatch criteria
cpe:2.3:a:cheyenne:inoculan_anti-virus_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.2HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.04%
Probability of exploitation in next 30 days
EPSS Percentile
60.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-19083 · Jun 10, 1998
This CVE's current EPSS score of 0.0104 is in the 79th percentile among its peer group of 3,237 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, 0.0 Mastodon, and 0.5 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/1536
securityfocus.com / archive/1/9515
ExploitPatchVendor Advisory
securityfocus.com / bid/106