{"id":"CVE-2021-27241","aliases":["EUVD-2021-14006","GHSA-76qj-3c6g-8v48"],"status":"published","title":"This vulnerability allows local attackers to delete arbitrary directories on affected...","description":"This vulnerability allows local attackers to delete arbitrary directories on affected installations of Avast Premium Security 20.8.2429 (Build 20.8.5653.561). An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the AvastSvc.exe module. By creating a directory junction, an attacker can abuse the service to delete a directory. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-12082.","severity":{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0027,"percentile":0.19492,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-59"],"published":"2021-03-29T21:05:31Z","modified":"2026-06-17T03:44:31Z","products":[{"vendor":"avast","product":"premium security"},{"vendor":"avast","product":"premium_security"}],"references":[{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-208/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27241"},{"url":"https://github.com/advisories/GHSA-76qj-3c6g-8v48"}],"sources":{"cve":[{"id":"CVE-2021-27241","description":"This vulnerability allows local attackers to delete arbitrary directories on affected installations of Avast Premium Security 20.8.2429 (Build 20.8.5653.561). An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the AvastSvc.exe module. By creating a directory junction, an attacker can abuse the service to delete a directory. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-12082.","status":"published","published":"2021-03-29T21:05:31Z","modified":"2024-08-03T20:48:15.888Z","cvss":[{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T14:33:04.360272Z"}],"euvd":[{"id":"EUVD-2021-14006","description":"This vulnerability allows local attackers to delete arbitrary directories on affected installations of Avast Premium Security 20.8.2429 (Build 20.8.5653.561). An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the AvastSvc.exe module. By creating a directory junction, an attacker can abuse the service to delete a directory. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-12082.","status":"published","published":"2021-03-29T21:05:31Z","modified":"2024-08-03T20:48:15Z","cvss":[{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium"}],"updated_at":"2026-11-03T03:24:49.808499Z"}],"ghsa":[{"id":"GHSA-76qj-3c6g-8v48","title":"This vulnerability allows local attackers to delete arbitrary directories on affected...","description":"This vulnerability allows local attackers to delete arbitrary directories on affected installations of Avast Premium Security 20.8.2429 (Build 20.8.5653.561). An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.\n\nThe specific flaw exists within the AvastSvc.exe module. By creating a directory junction, an attacker can abuse the service to delete a directory. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-12082.","status":"published","published":"2022-05-24T17:45:37Z","modified":"2023-01-29T05:06:10Z","cwes":["CWE-59"],"updated_at":"2026-11-02T14:45:57.703827Z"}],"nvd":[{"id":"CVE-2021-27241","description":"This vulnerability allows local attackers to delete arbitrary directories on affected installations of Avast Premium Security 20.8.2429 (Build 20.8.5653.561). An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the AvastSvc.exe module. By creating a directory junction, an attacker can abuse the service to delete a directory. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-12082.","status":"published","published":"2021-03-29T21:15:12.593Z","modified":"2026-06-17T03:44:31.85Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"primary"},{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"secondary"},{"version":"2.0","score":3.6,"vector":"AV:L/AC:L/Au:N/C:N/I:P/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T14:06:51.197859Z"}]}}