CVE-2004-0308

CRITICAL

Unknown vulnerability in Cisco ONS 15327 before 4.1(3), ONS 15454 before 4.6(1), ONS 15454 SD before 4.1(3), and Cisco ONS15600 before 1.3(0) allows a superuser whose account is locked out, disable...

Affects 1 product across 1 vendor.

BCS7.24
CVSS 2.010.0
EPSS1.7%
Percentile75th
PatchPatched
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
◆ SAGE Intelligence — CITED Relevance Research Team

This vulnerability was disclosed in 2004. A critical vulnerability affects Cisco systems (CVE-2004-0308). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2004-GLOBAL-007851-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2004-0308?
This vulnerability was disclosed in 2004. A critical vulnerability affects Cisco systems (CVE-2004-0308). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2004-0308?
CVE-2004-0308 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 1.7%.
Is CVE-2004-0308 actively exploited?
No confirmed active exploitation of CVE-2004-0308 as of 2026-05-30.
How do I remediate CVE-2004-0308?
Priority: MEDIUM. Advisory: http://www.cisco.com/warp/public/707/cisco-sa-20040219-ONS.shtml PSIRT: [email protected]
What systems are affected by CVE-2004-0308?
CVE-2004-0308 affects: Cisco.
Vulnerability Details
CVE IDCVE-2004-0308
BSIDBS-2004-GLOBAL-007851-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2004-11-24
Last Modified2026-04-16
ICS Relevance55%
Domains
NETWORK-INFRA
SourceNVD
Official Description

Unknown vulnerability in Cisco ONS 15327 before 4.1(3), ONS 15454 before 4.6(1), ONS 15454 SD before 4.1(3), and Cisco ONS15600 before 1.3(0) allows a superuser whose account is locked out, disabled, or suspended to gain unauthorized access via a Telnet connection to the VxWorks shell.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: Unknown vulnerability in Cisco ONS 15327 before 4.1(3), ONS 15454 before 4.6(1), ONS 15454 SD before 4.1(3), and Cisco ONS15600 before 1.3(0) allows a superuser whose account is locked out, disabled, or suspended to gain unauthorized access via a Telnet connection to the VxWorks shell. CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: LOW

Affected Products
VendorProductFixed Version
Cisco Optical Networking Systems Software —
Remediation
View Vendor Advisory →

Remediation Priority: MEDIUM

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: July 2026 | Threat Age: 7913 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
SAGE Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hashc7e07d17d46ccf2326d35e10e17d355795c3000ecbac15922c9182e5cb1e118eb0a8cc6d08d53eb4b529c4870580c3f2238f7137b7167401138a660d3974f254
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