{"id":"CVE-2002-1336","aliases":["DEBIAN-CVE-2002-1336","EUVD-2002-1320","GHSA-fcjm-23wr-m9g6"],"status":"published","title":"TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows...","description":"TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.02404,"percentile":0.84155,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2002-12-11T05:00:00Z","modified":"2026-10-22T23:47:28Z","fixes":[{"ecosystem":"Debian:12","package":"tightvnc","fixed_in":["1.2.6-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"tightvnc","fixed_in":["1.2.6-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"tightvnc","fixed_in":["1.2.6-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"tightvnc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.6-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"tightvnc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.6-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"tightvnc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.6-1"}]}]}],"products":[{"vendor":"tightvnc","product":"tightvnc"}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/5992","tags":["vdb-entry","x_refsource_XF","x_transferred","web"]},{"url":"http://www.redhat.com/support/errata/RHSA-2002-287.html","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred","web"]},{"url":"http://marc.info/?l=bugtraq\u0026m=102753170201524\u0026w=2","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred","web"]},{"url":"http://www.redhat.com/support/errata/RHSA-2003-041.html","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred","web"]},{"url":"http://www.mandrakesoft.com/security/advisories?name=MDKSA-2003:022","tags":["vendor-advisory","x_refsource_MANDRAKE","x_transferred","advisory"]},{"url":"http://distro.conectiva.com.br/atualizacoes/?id=a\u0026anuncio=000640","tags":["vendor-advisory","x_refsource_CONECTIVA","x_transferred","web"]},{"url":"http://www.tightvnc.com/WhatsNew.txt","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://marc.info/?l=bugtraq\u0026m=102769183913594\u0026w=2","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/5296","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2002-1336"},{"url":"https://github.com/advisories/GHSA-fcjm-23wr-m9g6"},{"url":"https://security-tracker.debian.org/tracker/CVE-2002-1336","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2002-1336","description":"TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.","status":"published","published":"2004-09-01T04:00:00Z","modified":"2024-08-08T03:19:28.608Z","updated_at":"2026-11-02T14:33:54.972584Z"}],"euvd":[{"id":"EUVD-2002-1320","description":"TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.","status":"published","published":"2004-09-01T04:00:00Z","modified":"2024-08-08T03:19:28Z","updated_at":"2026-11-03T01:14:56.771794Z"}],"ghsa":[{"id":"GHSA-fcjm-23wr-m9g6","title":"TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows...","description":"TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.","status":"published","published":"2022-04-30T18:20:57Z","modified":"2023-01-30T05:06:20Z","updated_at":"2026-11-02T14:47:28.159322Z"}],"nvd":[{"id":"CVE-2002-1336","description":"TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.","status":"published","published":"2002-12-11T05:00:00Z","modified":"2026-06-16T21:59:07.64Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:00:43.239725Z"}],"osv":[{"id":"CVE-2002-1336","description":"TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.","status":"published","published":"2002-12-11T05:00:00Z","modified":"2026-04-10T03:34:23.550995Z","updated_at":"2026-11-02T15:43:55.998148Z"},{"id":"DEBIAN-CVE-2002-1336","description":"TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.","status":"published","published":"2002-12-11T05:00:00Z","modified":"2026-10-22T23:47:28.416903261Z","updated_at":"2026-11-02T15:45:22.248131Z"}]}}