CVE-2002-1553

Cisco ONS15454 and ONS15327 running ONS before 3.4 allows remote attackers to modify the system configuration and delete files by establishing an FTP connection to the TCC, TCC+ or XTC using a username and password that does not exist.

Published: 2003-03-31 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2002-1553 is rated Moderate Risk (55.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.61%). Review affected assets and schedule 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-2002-1553

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 1.76% 1.61% -0.15%
2 2026-03-05 0.74% 1.76% +1.02%
3 2025-03-30 — 0.74% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2002-1553

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P 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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2002-1553

Affected software / configurations for CVE-2002-1553

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-2002-1553

cvelogic Threat Intelligence