{"cve":"CVE-2007-4991","nvd":{"published":"2007-09-21T19:17:00.000","modified":"2026-06-16T22:45:14.210","status":"Modified","description":"The SOCKS4 Proxy in Microsoft Internet Security and Acceleration (ISA) Server 2004 SP1 and SP2 allows remote attackers to obtain potentially sensitive information (the destination IP address of another user's session) via an empty packet.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-200"],"references":["http://osvdb.org/45906","http://www.securityfocus.com/bid/25753","http://www.securitytracker.com/id?1018727","http://www.zerodayinitiative.com/advisories/ZDI-07-053.html","https://exchange.xforce.ibmcloud.com/vulnerabilities/36715"],"products":["microsoft:isa_server"],"source":"nvd","synced_at":"2026-10-19T19:48:28.501292361+00:00"},"epss":{"cve":"CVE-2007-4991","score":0.16148,"percentile":0.96929,"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."]}