{"id":"CVE-2020-20118","aliases":["EUVD-2020-12908","GHSA-qjj5-85f7-r9rp"],"status":"published","title":"Buffer Overflow vulnerability in Avast AntiVirus before v.19.7 allows a local attacker to cause a...","description":"Buffer Overflow vulnerability in Avast AntiVirus before v.19.7 allows a local attacker to cause a denial of service via a crafted request to the aswSnx.sys driver.","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":"2026-11-09","score":0.00165,"percentile":0.05781,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2023-07-11T00:00:00Z","modified":"2026-07-09T00:16:52Z","products":[{"vendor":"avast","product":"antivirus"}],"references":[{"url":"https://gitlab.com/yongchuank/avast-aswsnx-ioctl-82ac0060-oob-write","tags":["x_transferred","Patch","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-20118"},{"url":"http://avast.com"},{"url":"https://github.com/advisories/GHSA-qjj5-85f7-r9rp"}],"sources":{"cve":[{"id":"CVE-2020-20118","description":"Buffer Overflow vulnerability in Avast AntiVirus before v.19.7 allows a local attacker to cause a denial of service via a crafted request to the aswSnx.sys driver.","status":"published","published":"2023-07-11T00:00:00Z","modified":"2026-07-09T00:09:43.24Z","updated_at":"2026-11-02T14:35:45.763329Z"}],"euvd":[{"id":"EUVD-2020-12908","description":"Buffer Overflow vulnerability in Avast AntiVirus before v.19.7 allows a local attacker to cause a denial of service via a crafted request to the aswSnx.sys driver.","status":"published","published":"2023-07-11T00:00:00Z","modified":"2026-07-09T00:09:43Z","updated_at":"2026-11-02T18:20:10.095263Z"}],"ghsa":[{"id":"GHSA-qjj5-85f7-r9rp","title":"Buffer Overflow vulnerability in Avast AntiVirus before v.19.7 allows a local attacker to cause a...","description":"Buffer Overflow vulnerability in Avast AntiVirus before v.19.7 allows a local attacker to cause a denial of service via a crafted request to the aswSnx.sys driver.","status":"published","published":"2023-07-11T15:31:17Z","modified":"2024-04-04T05:56:34Z","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"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:56:37.597078Z"}],"nvd":[{"id":"CVE-2020-20118","description":"Buffer Overflow vulnerability in Avast AntiVirus before v.19.7 allows a local attacker to cause a denial of service via a crafted request to the aswSnx.sys driver.","status":"published","published":"2023-07-11T14:15:09.3Z","modified":"2026-07-09T00:16:52.23Z","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"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:06:47.910346Z"}]}}