The NFS server in Microsoft Windows Server 2008 R2 and R2 SP1 and Server 2012 allows remote attackers to cause a denial of service (NULL pointer dereference and reboot) via an attempted renaming of a file or folder located on a read-only share, aka "NULL Dereference Vulnerability."
Conclusion & alert: CVE-2013-1281 is rated Moderate Risk (57.5/100): CVSS High severity, with high exploitation likelihood (EPSS 23.86%, 98th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. 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 | 2026-06-15 | 68.54% | 23.86% | -44.69% |
| 2 | 2025-03-30 | 63.09% | 68.54% | +5.45% |
| 3 | 2025-03-29 | — | 63.09% | — |
Full EPSS history (20 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.1 | 2.0 | HIGH |
|
8.6 | 6.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | windows_server_2008 | r2 | cpe:2.3:o:microsoft:windows_server_2008:r2:-:itanium:*:*:*:*:* |
| microsoft | windows_server_2008 | r2 | cpe:2.3:o:microsoft:windows_server_2008:r2:-:x64:*:*:*:*:* |
| microsoft | windows_server_2012 | — | cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* |