CVE-1999-1588

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2022-04-30. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 10%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
95.0%
KEV
Not listed

Published

December 31, 1999

Last Modified

June 16, 2026

Advisory Details (3)

Auto-updated Jun 20, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic
http://www.securityfocus.com/data/vulnerabilities/exploits/nlps_server.c
generic
http://www.securityfocus.com/bid/2319
generic🟡 PoC Available

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

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 2× in last 7d / 16× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 08:22 UTCEPSS rescore
  2. 2026-07-08 15:08 UTCEPSS rescore
  3. 2026-07-04 06:26 UTCEPSS rescore
  4. 2026-07-02 14:00 UTCEPSS rescore
  5. 2026-06-29 14:02 UTCEPSS rescore
  6. 2026-06-28 14:02 UTCEPSS rescore
  7. 2026-06-27 03:04 UTCEPSS rescore
  8. 2026-06-24 14:01 UTCEPSS rescore
  9. 2026-06-23 21:29 UTCEPSS rescore
  10. 2026-06-22 14:22 UTCEPSS rescore
  11. 2026-06-19 19:22 UTCEPSS rescore
  12. 2026-06-18 17:49 UTCEPSS rescore
  13. 2026-06-18 17:49 UTCEPSS rescore
  14. 2026-06-17 17:49 UTCEPSS rescore
  15. 2026-06-16 17:49 UTCEPSS rescore
  16. 2026-06-14 23:13 UTCEPSS rescore
  17. 2026-06-13 22:56 UTCEPSS rescore
  18. 2026-06-12 23:07 UTCEPSS rescore
  19. 2026-06-11 13:55 UTCEPSS rescore
  20. 2026-06-10 22:13 UTCEPSS rescore
  21. 2026-06-10 13:17 UTCEPSS rescore
  22. 2026-06-08 14:13 UTCEPSS rescore
  23. 2026-06-07 15:21 UTCEPSS rescore
  24. 2026-06-06 13:44 UTCEPSS rescore
  25. 2026-06-04 13:09 UTCEPSS rescore
Show 39 more
  1. 2026-06-02 20:10 UTCEPSS rescore
  2. 2026-06-01 13:48 UTCEPSS rescore
  3. 2026-05-31 00:13 UTCEPSS rescore
  4. 2026-05-31 00:13 UTCEPSS rescore
  5. 2026-05-29 13:40 UTCEPSS rescore
  6. 2026-05-28 13:42 UTCEPSS rescore
  7. 2026-05-28 13:42 UTCEPSS rescore
  8. 2026-05-28 13:42 UTCEPSS rescore
  9. 2026-05-28 13:42 UTCEPSS rescore
  10. 2026-05-27 13:37 UTCEPSS rescore
  11. 2026-05-27 13:37 UTCEPSS rescore
  12. 2026-05-26 13:41 UTCEPSS rescore
  13. 2026-05-26 13:41 UTCEPSS rescore
  14. 2026-05-26 13:41 UTCEPSS rescore
  15. 2026-05-26 07:16 UTCEPSS rescore
  16. 2026-05-26 07:16 UTCEPSS rescore
  17. 2026-05-22 21:15 UTCEPSS rescore
  18. 2026-05-21 22:38 UTCEPSS rescore
  19. 2026-05-20 22:36 UTCEPSS rescore
  20. 2026-05-20 11:20 UTCEPSS rescore
  21. 2026-05-20 11:20 UTCEPSS rescore
  22. 2026-05-20 08:10 UTCEG score recompute
  23. 2026-05-20 08:10 UTCGHSA enrichment
  24. 2026-05-20 03:48 UTCEG score recompute
  25. 2026-05-20 03:48 UTCGHSA enrichment
  26. 2026-05-19 23:31 UTCEG score recompute
  27. 2026-05-19 23:31 UTCGHSA enrichment
  28. 2026-05-19 19:14 UTCEG score recompute
  29. 2026-05-19 19:14 UTCGHSA enrichment
  30. 2026-05-19 14:57 UTCEG score recompute
  31. 2026-05-19 14:57 UTCGHSA enrichment
  32. 2026-05-19 10:40 UTCEG score recompute
  33. 2026-05-19 10:40 UTCGHSA enrichment
  34. 2026-05-19 06:12 UTCEG score recompute
  35. 2026-05-19 06:12 UTCGHSA enrichment
  36. 2026-05-19 01:56 UTCEG score recompute
  37. 2026-05-19 01:56 UTCGHSA enrichment
  38. 2026-05-18 21:29 UTCEPSS rescore
  39. 2026-05-18 21:29 UTCEPSS rescore

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 ↗

Related CVEs(same CWE)

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 June 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 95.0% 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 v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
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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