CVE-1999-1588

CRITICALNVD 9.89.8—Weaponized

9.8

Buffer overflow in nlps_server in Sun Solaris x86 2.4, 2.5, and 2.5.1 allows remote attackers to execute arbitrary code as root via a long string beginning with "NLPS:002:002:" to the listen (aka System V listener) port, TCP port 2766.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 95.3%
KEV: Not listed

Published

December 31, 1999

Last Modified

April 16, 2026

Advisory Details (1)

Auto-updated Apr 29, 2026

🔬 Proof of concept available. No patch confirmed yet.

generic🟡 PoC Available

Exploit Database - Exploits for Penetration Testers, Researchers, and Ethical Hackers

http://security-protocols.com/sploits/unsorted_exploits/nlps_server.c

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:40 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:37 UTCepss_batch
2026-05-27 13:37 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-21 22:38 UTCepss_batch
2026-05-20 22:36 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-20 08:10 UTCEG score recompute
2026-05-20 08:10 UTCGHSA enrichment
2026-05-20 03:48 UTCEG score recompute

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-20602✓ verified
First seen Apr 1, 1998
Solaris x86 2.4/2.5 - nlps_server Buffer Overflow
Open source ↗

Frequently asked(5)

What is CVE-1999-1588?

CVE-1999-1588 is a critical vulnerability published on December 31, 1999. Buffer overflow in nlps_server in Sun Solaris x86 2.4, 2.5, and 2.5.1 allows remote attackers to execute arbitrary code as root via a long string beginning with "NLPS:002:002:" to the listen (aka System V listener) port, TCP port 2766.

When was CVE-1999-1588 disclosed?

CVE-1999-1588 was first published in the National Vulnerability Database on December 31, 1999, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-1999-1588 actively exploited?

CVE-1999-1588 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-1999-1588?

CVE-1999-1588 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-1999-1588?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-1588, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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