{"id":"CVE-2004-2621","aliases":["EUVD-2004-2612","GHSA-8f69-wvhw-fqc8"],"status":"published","title":"Nortel Contivity VPN Client 2.1.7, 3.00, 3.01, 4.91, and 5.01, when opening a VPN tunnel, does...","description":"Nortel Contivity VPN Client 2.1.7, 3.00, 3.01, 4.91, and 5.01, when opening a VPN tunnel, does not check the gateway certificate until after a dialog box has been displayed to the user, which creates a race condition that allows remote attackers to perform a man-in-the-middle (MITM) attack.","severity":{"version":"2.0","score":4,"vector":"AV:N/AC:H/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00746,"percentile":0.55105,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2004-12-31T05:00:00Z","modified":"2026-06-16T22:09:59Z","products":[{"vendor":"nortel","product":"contivity"}],"references":[{"url":"http://www130.nortelnetworks.com/cgi-bin/eserv/cs/main.jsp?level=6\u0026category=8\u0026subcategory=6\u0026subtype=\u0026DocumentOID=276620\u0026RenditionID=REND159588","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/17812","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://www.securityfocus.com/bid/11495","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://www.osvdb.org/11002","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"http://secunia.com/advisories/12881","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory"]},{"url":"http://securitytracker.com/id?1011846","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2004-2621"},{"url":"https://github.com/advisories/GHSA-8f69-wvhw-fqc8"}],"sources":{"cve":[{"id":"CVE-2004-2621","description":"Nortel Contivity VPN Client 2.1.7, 3.00, 3.01, 4.91, and 5.01, when opening a VPN tunnel, does not check the gateway certificate until after a dialog box has been displayed to the user, which creates a race condition that allows remote attackers to perform a man-in-the-middle (MITM) attack.","status":"published","published":"2005-12-04T22:00:00Z","modified":"2024-08-08T01:36:24.561Z","updated_at":"2026-11-02T14:34:53.70484Z"}],"euvd":[{"id":"EUVD-2004-2612","description":"Nortel Contivity VPN Client 2.1.7, 3.00, 3.01, 4.91, and 5.01, when opening a VPN tunnel, does not check the gateway certificate until after a dialog box has been displayed to the user, which creates a race condition that allows remote attackers to perform a man-in-the-middle (MITM) attack.","status":"published","published":"2005-12-04T22:00:00Z","modified":"2024-08-08T01:36:24Z","updated_at":"2026-11-03T01:15:09.64087Z"}],"ghsa":[{"id":"GHSA-8f69-wvhw-fqc8","title":"Nortel Contivity VPN Client 2.1.7, 3.00, 3.01, 4.91, and 5.01, when opening a VPN tunnel, does...","description":"Nortel Contivity VPN Client 2.1.7, 3.00, 3.01, 4.91, and 5.01, when opening a VPN tunnel, does not check the gateway certificate until after a dialog box has been displayed to the user, which creates a race condition that allows remote attackers to perform a man-in-the-middle (MITM) attack.","status":"published","published":"2022-04-29T03:01:47Z","modified":"2023-01-30T05:04:19Z","updated_at":"2026-11-02T14:47:01.271351Z"}],"nvd":[{"id":"CVE-2004-2621","description":"Nortel Contivity VPN Client 2.1.7, 3.00, 3.01, 4.91, and 5.01, when opening a VPN tunnel, does not check the gateway certificate until after a dialog box has been displayed to the user, which creates a race condition that allows remote attackers to perform a man-in-the-middle (MITM) attack.","status":"published","published":"2004-12-31T05:00:00Z","modified":"2026-06-16T22:09:59.903Z","cvss":[{"version":"2.0","score":4,"vector":"AV:N/AC:H/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:00:53.133049Z"}]}}