How severe is CVE-1999-0005?

CVE-1999-0005 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-1999-0005 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0005?

CVE-1999-0005 primarily affects Netscape Messaging Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0005?

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-1999-0005 published?

CVE-1999-0005 was published on 1998-07-20 and last updated on 2026-06-16.

CVE-1999-0005

CVE-1999-0005 is a critical-severity vulnerability in Netscape Messaging Server with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 18% (97th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Netscape Messaging Server
Published: 1998-07-20
Last modified: 2026-06-16

Description

Arbitrary command execution via IMAP buffer overflow in authenticate command.

Frequently asked questions

What is CVE-1999-0005?: Arbitrary command execution via IMAP buffer overflow in authenticate command.
How severe is CVE-1999-0005?: CVE-1999-0005 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-1999-0005 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0005?: CVE-1999-0005 primarily affects Netscape Messaging Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0005?: 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-1999-0005 published?: CVE-1999-0005 was published on 1998-07-20 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:netscape:messaging_server:3.55:*:*:*:*:*:*:*
cpe:2.3:a:university_of_washington:imap:10.234:*:*:*:*:*:*:*

More vulnerabilities in Netscape Messaging Server

CVE-2000-0961 — Critical (CVSS 10.0): Buffer overflow in IMAP server in Netscape Messaging Server 4.15 Patch 2 allows local users to execute arbitrary…
CVE-2000-0960 — Medium (CVSS 5.0): The POP3 server in Netscape Messaging Server 4.15p1 generates different error messages for incorrect user names versus…
CVE-1999-1532 — Medium (CVSS 5.0): Netscape Messaging Server 3.54, 3.55, and 3.6 allows a remote attacker to cause a denial of service (memory exhaustion)…
CVE-1999-0007 — Medium (CVSS 5.0): Information from SSL-encrypted sessions via PKCS #1.

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