The Windows NAT Driver (aka winnat) service in Microsoft Windows Server 2012 does not properly validate memory addresses during the processing of ICMP packets, which allows remote attackers to cause a denial of service (memory corruption and system hang) via crafted packets, aka "Windows NAT Denial of Service Vulnerability."
Conclusion & alert: CVE-2013-3182 is rated High Risk (67.2/100): CVSS High severity, with high exploitation likelihood (EPSS 88.83%, 100th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +1.17% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize 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 | 2026-02-16 | 87.66% | 88.83% | +1.17% |
| 2 | 2026-01-11 | 80.59% | 87.66% | +7.08% |
| 3 | 2025-07-31 | — | 80.59% | — |
Full EPSS history (23 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.8 | 2.0 | HIGH |
|
10.0 | 6.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | windows_server_2012 | — | cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://www.us-cert.gov/ncas/alerts/TA13-225A | Third Party Advisory US Government Resource |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-064 | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18199 |