CVE-2002-1558

Cisco ONS15454 and ONS15327 running ONS before 3.4 have an account for the VxWorks Operating System in the TCC, TCC+ and XTC that cannot be changed or disabled, which allows remote attackers to gain privileges by connecting to the account via Telnet.

Published: 2003-03-31 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2002-1558 is rated High Risk (71.4/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 2.79%). EPSS rose +1.87% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

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-2002-1558

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 0.92% 2.79% +1.87%
2 2025-03-30 1.70% 0.92% -0.78%
3 2025-03-29 — 1.70% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2002-1558

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
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.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2002-1558

Affected software / configurations for CVE-2002-1558

Vendor Product Version Raw CPE
cisco optical_networking_systems_software 3.0 cpe:2.3:a:cisco:optical_networking_systems_software:3.0:*:*:*:*:*:*:*
cisco optical_networking_systems_software 3.1.0 cpe:2.3:a:cisco:optical_networking_systems_software:3.1.0:*:*:*:*:*:*:*
cisco optical_networking_systems_software 3.2 cpe:2.3:a:cisco:optical_networking_systems_software:3.2:*:*:*:*:*:*:*
cisco optical_networking_systems_software 3.2.0 cpe:2.3:a:cisco:optical_networking_systems_software:3.2.0:*:*:*:*:*:*:*
cisco optical_networking_systems_software 3.3.0 cpe:2.3:a:cisco:optical_networking_systems_software:3.3.0:*:*:*:*:*:*:*

References for CVE-2002-1558

cvelogic Threat Intelligence