{"id":"CVE-2020-9451","aliases":["EUVD-2020-30270","GHSA-wghq-w68q-jx98"],"status":"published","title":"An issue was discovered in Acronis True Image 2020 24.5.22510. anti_ransomware_service.exe keeps...","description":"An issue was discovered in Acronis True Image 2020 24.5.22510. anti_ransomware_service.exe keeps a log in a folder where unprivileged users have write permissions. The logs are generated in a predictable pattern, allowing an unprivileged user to create a hardlink from a (not yet created) log file to anti_ransomware_service.exe. On reboot, this forces the anti_ransomware_service to try to write its log into its own process, crashing in a SHARING VIOLATION. This crash occurs on every reboot.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00384,"percentile":0.3274,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-276"],"published":"2021-05-25T11:01:41Z","modified":"2026-06-17T03:27:58Z","products":[{"vendor":"acronis","product":"true_image_2020"}],"references":[{"url":"https://www.acronis.com","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://danishcyberdefence.dk/blog","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://madsjoensen.dk/cve-2020-9451/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-9451"},{"url":"https://github.com/advisories/GHSA-wghq-w68q-jx98"}],"sources":{"cve":[{"id":"CVE-2020-9451","description":"An issue was discovered in Acronis True Image 2020 24.5.22510. anti_ransomware_service.exe keeps a log in a folder where unprivileged users have write permissions. The logs are generated in a predictable pattern, allowing an unprivileged user to create a hardlink from a (not yet created) log file to anti_ransomware_service.exe. On reboot, this forces the anti_ransomware_service to try to write its log into its own process, crashing in a SHARING VIOLATION. This crash occurs on every reboot.","status":"published","published":"2021-05-25T11:01:41Z","modified":"2024-08-04T10:26:16.116Z","updated_at":"2026-11-02T14:35:49.538427Z"}],"euvd":[{"id":"EUVD-2020-30270","description":"An issue was discovered in Acronis True Image 2020 24.5.22510. anti_ransomware_service.exe keeps a log in a folder where unprivileged users have write permissions. The logs are generated in a predictable pattern, allowing an unprivileged user to create a hardlink from a (not yet created) log file to anti_ransomware_service.exe. On reboot, this forces the anti_ransomware_service to try to write its log into its own process, crashing in a SHARING VIOLATION. This crash occurs on every reboot.","status":"published","published":"2021-05-25T11:01:41Z","modified":"2024-08-04T10:26:16Z","updated_at":"2026-11-03T03:07:54.025234Z"}],"ghsa":[{"id":"GHSA-wghq-w68q-jx98","title":"An issue was discovered in Acronis True Image 2020 24.5.22510. anti_ransomware_service.exe keeps...","description":"An issue was discovered in Acronis True Image 2020 24.5.22510. anti_ransomware_service.exe keeps a log in a folder where unprivileged users have write permissions. The logs are generated in a predictable pattern, allowing an unprivileged user to create a hardlink from a (not yet created) log file to anti_ransomware_service.exe. On reboot, this forces the anti_ransomware_service to try to write its log into its own process, crashing in a SHARING VIOLATION. This crash occurs on every reboot.","status":"published","published":"2022-05-24T19:03:14Z","modified":"2023-01-29T05:06:46Z","cwes":["CWE-276"],"updated_at":"2026-11-02T14:46:05.929333Z"}],"nvd":[{"id":"CVE-2020-9451","description":"An issue was discovered in Acronis True Image 2020 24.5.22510. anti_ransomware_service.exe keeps a log in a folder where unprivileged users have write permissions. The logs are generated in a predictable pattern, allowing an unprivileged user to create a hardlink from a (not yet created) log file to anti_ransomware_service.exe. On reboot, this forces the anti_ransomware_service to try to write its log into its own process, crashing in a SHARING VIOLATION. This crash occurs on every reboot.","status":"published","published":"2021-05-25T12:15:07.797Z","modified":"2026-06-17T03:27:58.293Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T14:06:43.288951Z"}]}}