Cisco ONS15454 optical transport platform running ONS 3.1.0 to 3.2.0 allows remote attackers to cause a denial of service (reset) by sending IP packets with non-zero Type of Service (TOS) bits to the Timing Control Card (TCC) LAN interface.
Conclusion & alert: CVE-2002-0952 is rated Moderate Risk (46.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.66%). 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 | 0.74% | 1.66% | +0.92% |
| 2 | 2025-03-30 | 0.76% | 0.74% | -0.03% |
| 3 | 2025-03-29 | — | 0.76% | — |
Full EPSS history (7 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 | 3.1.0 | cpe:2.3:a:cisco:optical_networking_systems_software:3.1.0:*:*:*:*:*:*:* |
| cisco | optical_networking_systems_software | 3.2.0 | cpe:2.3:a:cisco:optical_networking_systems_software:3.2.0:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://www.cisco.com/warp/public/707/ons-tos-vuln-pub.shtml | |
| http://www.iss.net/security_center/static/9377.php | Vendor Advisory |
| http://www.securityfocus.com/bid/5058 | Patch Vendor Advisory |