{"id":"CVE-2018-8929","aliases":["EUVD-2018-20537","GHSA-x728-vr6f-27f3"],"status":"published","title":"Improper restriction of communication channel to intended endpoints vulnerability in HTTP daemon...","description":"Improper restriction of communication channel to intended endpoints vulnerability in HTTP daemon in Synology SSL VPN Client before 1.2.4-0224 allows remote attackers to conduct man-in-the-middle attacks via a crafted payload.","severity":{"version":"3.0","score":7.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00753,"percentile":0.55326,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-319","CWE-417"],"published":"2018-07-06T12:00:00Z","modified":"2026-06-17T02:05:40Z","products":[{"vendor":"sophos","product":"ssl vpn client"},{"vendor":"synology","product":"ssl vpn client"},{"vendor":"synology","product":"ssl_vpn_client"}],"references":[{"url":"https://www.synology.com/en-global/support/security/Synology_SA_18_19","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-8929"},{"url":"https://github.com/advisories/GHSA-x728-vr6f-27f3"}],"sources":{"cve":[{"id":"CVE-2018-8929","description":"Improper restriction of communication channel to intended endpoints vulnerability in HTTP daemon in Synology SSL VPN Client before 1.2.4-0224 allows remote attackers to conduct man-in-the-middle attacks via a crafted payload.","status":"published","published":"2018-07-06T12:00:00Z","modified":"2024-09-16T20:41:43.731Z","cvss":[{"version":"3.0","score":7.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-319"],"updated_at":"2026-11-02T14:35:04.172099Z"}],"euvd":[{"id":"EUVD-2018-20537","description":"Improper restriction of communication channel to intended endpoints vulnerability in HTTP daemon in Synology SSL VPN Client before 1.2.4-0224 allows remote attackers to conduct man-in-the-middle attacks via a crafted payload.","status":"published","published":"2018-07-06T12:00:00Z","modified":"2024-09-16T20:41:43Z","cvss":[{"version":"3.0","score":7.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"updated_at":"2026-11-03T00:55:11.71058Z"}],"ghsa":[{"id":"GHSA-x728-vr6f-27f3","title":"Improper restriction of communication channel to intended endpoints vulnerability in HTTP daemon...","description":"Improper restriction of communication channel to intended endpoints vulnerability in HTTP daemon in Synology SSL VPN Client before 1.2.4-0224 allows remote attackers to conduct man-in-the-middle attacks via a crafted payload.","status":"published","published":"2022-05-13T01:10:20Z","modified":"2023-02-01T05:03:35Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T14:50:05.01868Z"}],"nvd":[{"id":"CVE-2018-8929","description":"Improper restriction of communication channel to intended endpoints vulnerability in HTTP daemon in Synology SSL VPN Client before 1.2.4-0224 allows remote attackers to conduct man-in-the-middle attacks via a crafted payload.","status":"published","published":"2018-07-06T12:29:00.21Z","modified":"2026-06-17T02:05:40.317Z","cvss":[{"version":"3.0","score":7.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"secondary"},{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-319","CWE-417"],"updated_at":"2026-11-02T14:04:31.362791Z"}]}}