CVE-2004-0306

Cisco ONS 15327 before 4.1(3), ONS 15454 before 4.6(1), ONS 15454 SD before 4.1(3), and Cisco ONS 15600 before 1.3(0) enable TFTP service on UDP port 69 by default, which allows remote attackers to GET or PUT ONS system files on the current active TCC in the /flash0 or /flash1 directories.

Published: 2004-11-23 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2004-0306 is rated Moderate Risk (49.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.12%). EPSS rose +1.53% over the last day, indicating growing attacker interest. 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-2004-0306

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 0.59% 2.12% +1.53%
2 2026-05-07 0.41% 0.59% +0.18%
3 2025-03-30 — 0.41% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2004-0306

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N 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:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2004-0306

Affected software / configurations for CVE-2004-0306

Vendor Product Version Raw CPE
cisco optical_networking_systems_software 1.0 cpe:2.3:a:cisco:optical_networking_systems_software:1.0:*:*:*:*:*:*:*
cisco optical_networking_systems_software 4.0\(1\) cpe:2.3:a:cisco:optical_networking_systems_software:4.0\(1\):*:*:*:*:*:*:*
cisco optical_networking_systems_software 4.0\(2\) cpe:2.3:a:cisco:optical_networking_systems_software:4.0\(2\):*:*:*:*:*:*:*
cisco optical_networking_systems_software 4.0.0 cpe:2.3:a:cisco:optical_networking_systems_software:4.0.0:*:*:*:*:*:*:*
cisco optical_networking_systems_software 4.1\(0\) cpe:2.3:a:cisco:optical_networking_systems_software:4.1\(0\):*:*:*:*:*:*:*
cisco optical_networking_systems_software 4.1\(1\) cpe:2.3:a:cisco:optical_networking_systems_software:4.1\(1\):*:*:*:*:*:*:*
cisco optical_networking_systems_software 4.1\(2\) cpe:2.3:a:cisco:optical_networking_systems_software:4.1\(2\):*:*:*:*:*:*:*
cisco optical_networking_systems_software 4.1\(3\) cpe:2.3:a:cisco:optical_networking_systems_software:4.1\(3\):*:*:*:*:*:*:*
cisco optical_networking_systems_software 4.1.0 cpe:2.3:a:cisco:optical_networking_systems_software:4.1.0:*:*:*:*:*:*:*
cisco optical_networking_systems_software 4.5 cpe:2.3:a:cisco:optical_networking_systems_software:4.5:*:*:*:*:*:*:*

References for CVE-2004-0306

cvelogic Threat Intelligence