{"id":"CVE-2022-4291","aliases":["EUVD-2022-51647","GHSA-m5gg-2gxj-3qqx"],"status":"published","title":"Aswjsflt.dll in Avast Antivirus windows caused a crash of the Mozilla Firefox browser due to heap corruption","description":"The aswjsflt.dll library from Avast Antivirus windows contained a potentially exploitable heap corruption vulnerability that could enable an attacker to bypass the sandbox of the application it was loaded into, if applicable. This issue was fixed in version 18.0.1478 of the Script Shield Component.","severity":{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00449,"percentile":0.39313,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119","CWE-787"],"published":"2022-12-07T23:45:04Z","modified":"2026-06-17T05:20:30Z","products":[{"vendor":"avast","product":"avast antivirus"},{"vendor":"avast","product":"script_shield"},{"vendor":"nortonlifelock","product":"avast antivirus"}],"references":[{"url":"https://support.norton.com/sp/static/external/tools/security-advisories.html","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-4291"},{"url":"https://github.com/advisories/GHSA-m5gg-2gxj-3qqx"}],"sources":{"cve":[{"id":"CVE-2022-4291","title":"Aswjsflt.dll in Avast Antivirus windows caused a crash of the Mozilla Firefox browser due to heap corruption","description":"The aswjsflt.dll library from Avast Antivirus windows contained a potentially exploitable heap corruption vulnerability that could enable an attacker to bypass the sandbox of the application it was loaded into, if applicable. This issue was fixed in version 18.0.1478 of the Script Shield Component.\n","status":"published","published":"2022-12-07T23:45:04.707Z","modified":"2025-04-14T17:57:54.578Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:34:37.932195Z"}],"euvd":[{"id":"EUVD-2022-51647","description":"The aswjsflt.dll library from Avast Antivirus windows contained a potentially exploitable heap corruption vulnerability that could enable an attacker to bypass the sandbox of the application it was loaded into, if applicable. This issue was fixed in version 18.0.1478 of the Script Shield Component.\n","status":"published","published":"2022-12-07T23:45:04Z","modified":"2025-04-14T17:57:54Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T20:52:33.06705Z"}],"ghsa":[{"id":"GHSA-m5gg-2gxj-3qqx","title":"The aswjsflt.dll library from Avast Antivirus windows contained a potentially exploitable heap...","description":"The aswjsflt.dll library from Avast Antivirus windows contained a potentially exploitable heap corruption vulnerability that could enable an attacker to bypass the sandbox of the application it was loaded into, if applicable. This issue was fixed in version 18.0.1478 of the Script Shield Component.","status":"published","published":"2022-12-08T00:30:28Z","modified":"2023-07-05T05:01:20Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-119","CWE-787"],"updated_at":"2026-11-02T14:54:41.037164Z"}],"nvd":[{"id":"CVE-2022-4291","description":"The aswjsflt.dll library from Avast Antivirus windows contained a potentially exploitable heap corruption vulnerability that could enable an attacker to bypass the sandbox of the application it was loaded into, if applicable. This issue was fixed in version 18.0.1478 of the Script Shield Component.\n","status":"published","published":"2022-12-08T00:15:10.61Z","modified":"2026-06-17T05:20:30.127Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-119","CWE-787"],"updated_at":"2026-11-02T14:07:33.239526Z"}]}}