How severe is CVE-1999-1532?

CVE-1999-1532 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-1532 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1532?

CVE-1999-1532 primarily affects Netscape Messaging Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-1532?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-1999-1532 published?

CVE-1999-1532 was published on 1999-10-29 and last updated on 2026-06-16.

CVE-1999-1532

CVE-1999-1532 is a medium-severity vulnerability in Netscape Messaging Server with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Netscape Messaging Server
Published: 1999-10-29
Last modified: 2026-06-16

Description

Netscape Messaging Server 3.54, 3.55, and 3.6 allows a remote attacker to cause a denial of service (memory exhaustion) via a series of long RCPT TO commands.

Frequently asked questions

What is CVE-1999-1532?: Netscape Messaging Server 3.54, 3.55, and 3.6 allows a remote attacker to cause a denial of service (memory exhaustion) via a series of long RCPT TO commands.
How severe is CVE-1999-1532?: CVE-1999-1532 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-1532 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1532?: CVE-1999-1532 primarily affects Netscape Messaging Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-1532?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-1532 published?: CVE-1999-1532 was published on 1999-10-29 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:netscape:messaging_server:3.6:*:*:*:*:*:*:*
cpe:2.3:a:netscape:messaging_server:3.54:*:*:*:*:*:*:*
cpe:2.3:a:netscape:messaging_server:3.55:*:*:*:*:*:*:*

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…
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CVE-1999-0007 — Medium (CVSS 5.0): Information from SSL-encrypted sessions via PKCS #1.

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