How severe is CVE-1999-1555?

CVE-1999-1555 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-1999-1555 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1555?

CVE-1999-1555 affects Cheyenne Inoculan Anti-virus Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-1555?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-1999-1555 published?

CVE-1999-1555 was published on 1998-06-11 and last updated on 2026-06-16.

CVE-1999-1555

CVE-1999-1555 is a high-severity vulnerability in Cheyenne Inoculan Anti-virus Server with a CVSS 2.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.2)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cheyenne Inoculan Anti-virus Server
Published: 1998-06-11
Last modified: 2026-06-16

Description

Cheyenne InocuLAN Anti-Virus Server in Inoculan 4.0 before Service Pack 2 creates an update directory with "EVERYONE FULL CONTROL" permissions, which allows local users to cause Inoculan's antivirus update feature to install a Trojan horse dll.

Frequently asked questions

What is CVE-1999-1555?: Cheyenne InocuLAN Anti-Virus Server in Inoculan 4.0 before Service Pack 2 creates an update directory with "EVERYONE FULL CONTROL" permissions, which allows local users to cause Inoculan's antivirus update feature to install a Trojan horse dll.
How severe is CVE-1999-1555?: CVE-1999-1555 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-1999-1555 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1555?: CVE-1999-1555 affects Cheyenne Inoculan Anti-virus Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-1555?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-1999-1555 published?: CVE-1999-1555 was published on 1998-06-11 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:cheyenne:inoculan_anti-virus_server:*:*:*:*:*:*:*:*