Cisco ONS15454 and ONS15327 running ONS before 3.4 uses a "public" SNMP community string that cannot be changed, which allows remote attackers to obtain sensitive information.
Conclusion & alert: CVE-2002-1555 is rated Moderate Risk (46.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.64%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
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 | 1.17% | 1.64% | +0.47% |
| 2 | 2026-01-28 | 0.72% | 1.17% | +0.46% |
| 3 | 2025-03-30 | — | 0.72% | — |
Full EPSS history (8 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| 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:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://www.cisco.com/warp/public/707/ons-multiple-vuln-pub.shtml | Patch Vendor Advisory |
| http://www.iss.net/security_center/static/10507.php | Patch Vendor Advisory |
| http://www.securityfocus.com/bid/6081 | Patch Vendor Advisory |