Vulnerability in NeXT 1.0a and 1.0 with publicly accessible printers allows local users to gain privileges via a combination of the npd program and weak directory permissions.
Conclusion & alert: CVE-1999-1391 is rated Moderate Risk (50/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.39%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-07-17 | 0.07% | 0.39% | +0.33% |
| 2 | 2025-03-17 | 1.08% | 0.07% | -1.01% |
| 3 | 2024-12-17 | — | 1.08% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.2 | 2.0 | HIGH |
|
3.9 | 10.0 | [email protected] |
| URL | Tags |
|---|---|
| http://ciac.llnl.gov/ciac/bulletins/b-01.shtml | Patch Vendor Advisory |
| http://www.cert.org/advisories/CA-1990-06.html | Patch Third Party Advisory US Government Resource |
| http://www.iss.net/security_center/static/7143.php | |
| http://www.securityfocus.com/bid/10 |