How severe is CVE-1999-1086?

CVE-1999-1086 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-1999-1086 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1086?

CVE-1999-1086 primarily affects Novell Netware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-1086?

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

When was CVE-1999-1086 published?

CVE-1999-1086 was published on 1999-07-15 and last updated on 2026-06-16.

CVE-1999-1086

CVE-1999-1086 is a critical-severity vulnerability in Novell Netware with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Novell Netware
Published: 1999-07-15
Last modified: 2026-06-16

Description

Novell 5 and earlier, when running over IPX with a packet signature level less than 3, allows remote attackers to gain administrator privileges by spoofing the MAC address in IPC fragmented packets that make NetWare Core Protocol (NCP) calls.

Frequently asked questions

What is CVE-1999-1086?: Novell 5 and earlier, when running over IPX with a packet signature level less than 3, allows remote attackers to gain administrator privileges by spoofing the MAC address in IPC fragmented packets that make NetWare Core Protocol (NCP) calls.
How severe is CVE-1999-1086?: CVE-1999-1086 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-1999-1086 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1086?: CVE-1999-1086 primarily affects Novell Netware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-1086?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-1999-1086 published?: CVE-1999-1086 was published on 1999-07-15 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:o:novell:netware:*:*:*:*:*:*:*:*
cpe:2.3:o:novell:netware:4.1:*:*:*:*:*:*:*
cpe:2.3:o:novell:netware:4.11:sp5b:*:*:*:*:*:*

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