{"id":"CVE-2021-4105","aliases":["EUVD-2021-33988","GHSA-gr7g-5rvj-cf96"],"status":"published","title":"Unauthenticated Remote Code Execution on COSLAT Firewall","description":"Improper Handling of Parameters vulnerability in BG-TEK COSLAT Firewall allows Remote Code Inclusion.\n\nThis issue affects COSLAT Firewall: from 5.24.0.R.20180630 before 5.24.0.R.20210727.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00865,"percentile":0.5896,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-755"],"published":"2023-02-24T11:09:46Z","modified":"2026-06-17T04:19:02Z","products":[{"vendor":"bg-tek","product":"coslat firewall"},{"vendor":"bg-tek","product":"coslat_bx5s1d3_firmware"},{"vendor":"bg-tek","product":"coslat_bx5s1d4_firmware"},{"vendor":"bg-tek","product":"coslat_bx5s1d5_firmware"},{"vendor":"bg-tek","product":"coslat_rm1ds1000_firmware"},{"vendor":"bg-tek","product":"coslat_rm2ds2000_firmware"},{"vendor":"bg-tek","product":"coslat_rm2s200_firmware"},{"vendor":"bg-tek","product":"coslat_rm3s300_firmware"},{"vendor":"bg-tek","product":"coslat_rm4s500_firmware"}],"references":[{"url":"http://blog.coslat.com/2021/07/onemli-kritik-guncelleme-2021-07-27.html","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://www.usom.gov.tr/bildirim/tr-23-0108","tags":["government-resource","broken-link","x_transferred","Third Party Advisory"]},{"url":"https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-23-0108","tags":["government-resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4105"},{"url":"https://github.com/advisories/GHSA-gr7g-5rvj-cf96"}],"sources":{"cve":[{"id":"CVE-2021-4105","title":"Unauthenticated Remote Code Execution on COSLAT Firewall","description":"Improper Handling of Parameters vulnerability in BG-TEK COSLAT Firewall allows Remote Code Inclusion.\n\nThis issue affects COSLAT Firewall: from 5.24.0.R.20180630 before 5.24.0.R.20210727.","status":"published","published":"2023-02-24T11:09:46.71Z","modified":"2026-05-18T12:08:00.909Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-755"],"updated_at":"2026-11-02T14:33:07.697752Z"}],"euvd":[{"id":"EUVD-2021-33988","description":"Improper Handling of Parameters vulnerability in BG-TEK COSLAT Firewall allows Remote Code Inclusion.\n\nThis issue affects COSLAT Firewall: from 5.24.0.R.20180630 before 5.24.0.R.20210727.","status":"published","published":"2023-02-24T11:09:46Z","modified":"2026-05-18T12:08:00Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:21:16.642345Z"}],"ghsa":[{"id":"GHSA-gr7g-5rvj-cf96","title":"Improper Handling of Parameters vulnerability in BG-TEK COSLAT Firewall allows Remote Code...","description":"Improper Handling of Parameters vulnerability in BG-TEK COSLAT Firewall allows Remote Code Inclusion.This issue affects COSLAT Firewall: from 5.24.0.R.20180630 before 5.24.0.R.20210727.","status":"published","published":"2023-02-24T12:31:20Z","modified":"2026-05-18T15:31:35Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-755"],"updated_at":"2026-11-02T15:08:11.468783Z"}],"nvd":[{"id":"CVE-2021-4105","description":"Improper Handling of Parameters vulnerability in BG-TEK COSLAT Firewall allows Remote Code Inclusion.\n\nThis issue affects COSLAT Firewall: from 5.24.0.R.20180630 before 5.24.0.R.20210727.","status":"published","published":"2023-02-24T12:15:30.127Z","modified":"2026-06-17T04:19:02.697Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-755"],"updated_at":"2026-11-02T14:07:07.323379Z"}]}}