{"cve":"CVE-2009-2435","nvd":{"published":"2009-07-13T14:30:00.217","modified":"2026-06-16T23:09:26.667","status":"Modified","description":"The Sametime server in IBM Lotus Instant Messaging and Web Conferencing 6.5.1 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to enumerate valid usernames.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-255"],"references":["http://www.securityfocus.com/bid/35614","http://www.senseofsecurity.com.au/advisories/SOS-09-004.pdf","http://www.securityfocus.com/bid/35614","http://www.senseofsecurity.com.au/advisories/SOS-09-004.pdf"],"products":["ibm:lotus_instant_messaging_and_web_conferencing"],"source":"nvd","synced_at":"2026-10-19T19:54:07.895733559+00:00"},"epss":{"cve":"CVE-2009-2435","score":0.01064,"percentile":0.64682,"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."]}