CVE-1999-1253

Vulnerability in a kernel error handling routine in SCO OpenServer 5.0.2 and earlier, and SCO Internet FastStart 1.0, allows local users to gain root privileges.

Published: 1996-06-07 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-1999-1253 is rated Low Risk (39/100): CVSS High severity, with low exploitation likelihood (EPSS 0.39%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-1999-1253

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 2026-06-15 0.88% 0.39% -0.49%
2 2026-05-12 0.17% 0.88% +0.71%
3 2025-03-17 — 0.17% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-1999-1253

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-1999-1253

Affected software / configurations for CVE-1999-1253

Vendor Product Version Raw CPE
sco internet_faststart 1.0 cpe:2.3:o:sco:internet_faststart:1.0:*:*:*:*:*:*:*
sco openserver <= 5.0.2 cpe:2.3:o:sco:openserver:*:*:*:*:*:*:*:*
sco openserver 5.0 cpe:2.3:o:sco:openserver:5.0:*:*:*:*:*:*:*

References for CVE-1999-1253

cvelogic Threat Intelligence