{"cve":"CVE-2007-5633","nvd":{"published":"2007-10-23T17:46:00.000","modified":"2026-06-16T22:46:32.230","status":"Modified","description":"Speedfan.sys in Alfredo Milani Comparetti SpeedFan 4.33, when used on Microsoft Windows Vista x64, allows local users to read or write arbitrary MSRs, and gain privileges and load unsigned drivers, via the (1) IOCTL_RDMSR 0x9C402438 and (2) IOCTL_WRMSR 0x9C40243C IOCTLs to \\Device\\speedfan, as demonstrated by an IOCTL_WRMSR action on MSR_LSTAR.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://osvdb.org/41842","http://secunia.com/advisories/27312","http://www.bugtrack.almico.com/view.php?id=987","http://www.reversemode.com/index.php?option=com_content&task=view&id=42&Itemid=1","http://www.securityfocus.com/bid/26123"],"products":["almico:speedfan"],"source":"nvd","synced_at":"2026-10-19T19:48:28.501292361+00:00"},"epss":{"cve":"CVE-2007-5633","score":0.00935,"percentile":0.60792,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}