{"id":"CVE-2018-9129","aliases":["EUVD-2018-20729","GHSA-rxgc-f7rc-pv6h"],"status":"published","title":"ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key...","description":"ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake implementation used for IPsec based VPN connections.","severity":{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00965,"percentile":0.61928,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2018-08-15T18:00:00Z","modified":"2026-06-17T02:06:07Z","products":[{"vendor":"zyxel","product":"usg_1100_firmware"},{"vendor":"zyxel","product":"usg_110_firmware"},{"vendor":"zyxel","product":"usg_1900_firmware"},{"vendor":"zyxel","product":"usg_20w-vpn_firmware"},{"vendor":"zyxel","product":"usg_20w_firmware"},{"vendor":"zyxel","product":"usg_2200-vpn_firmware"},{"vendor":"zyxel","product":"usg_310_firmware"},{"vendor":"zyxel","product":"usg_40_firmware"},{"vendor":"zyxel","product":"usg_40w_firmware"},{"vendor":"zyxel","product":"usg_60_firmware"},{"vendor":"zyxel","product":"usg_60w_firmware"},{"vendor":"zyxel","product":"zywall_1100_firmware"},{"vendor":"zyxel","product":"zywall_110_firmware"},{"vendor":"zyxel","product":"zywall_310_firmware"},{"vendor":"zyxel","product":"zywall_vpn_100_firmware"},{"vendor":"zyxel","product":"zywall_vpn_300_firmware"},{"vendor":"zyxel","product":"zywall_vpn_50_firmware"}],"references":[{"url":"https://web-in-security.blogspot.com/2018/08/practical-bleichenbacher-attacks-on-ipsec-ike.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"ftp://ftp.zyxel.com/USG110/firmware/USG110_4.32%28AAPH.0%29C0_2.pdf","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://www.zyxel.com/support/bleichenbacher_attack_vulnerability.shtml","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-9129"},{"url":"https://github.com/advisories/GHSA-rxgc-f7rc-pv6h"}],"sources":{"cve":[{"id":"CVE-2018-9129","description":"ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake implementation used for IPsec based VPN connections.","status":"published","published":"2018-08-15T18:00:00Z","modified":"2024-08-05T07:17:51.409Z","updated_at":"2026-11-02T14:35:02.603326Z"}],"euvd":[{"id":"EUVD-2018-20729","description":"ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake implementation used for IPsec based VPN connections.","status":"published","published":"2018-08-15T18:00:00Z","modified":"2024-08-05T07:17:51Z","updated_at":"2026-11-03T02:40:00.889185Z"}],"ghsa":[{"id":"GHSA-rxgc-f7rc-pv6h","title":"ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key...","description":"ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake implementation used for IPsec based VPN connections.","status":"published","published":"2022-05-24T19:21:21Z","modified":"2023-01-30T05:04:12Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T14:46:59.889535Z"}],"nvd":[{"id":"CVE-2018-9129","description":"ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake implementation used for IPsec based VPN connections.","status":"published","published":"2018-08-15T18:29:01.23Z","modified":"2026-06-17T02:06:07.433Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:04:36.842579Z"}]}}