{"id":"CVE-2021-39306","aliases":["EUVD-2021-25667","GHSA-rcc4-26h9-5ggq"],"status":"published","title":"A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in...","description":"A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in the client code when an attacker sends a big size Authentication challenge text in WEP security.","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":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01307,"percentile":0.70816,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2021-12-22T18:08:42Z","modified":"2026-06-17T04:03:30Z","products":[{"vendor":"realtek","product":"rtl8195am_firmware"}],"references":[{"url":"https://www.realtek.com","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://www.amebaiot.com/en/security_bulletin/cve-2021-39306/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39306"},{"url":"https://github.com/advisories/GHSA-rcc4-26h9-5ggq"}],"sources":{"cve":[{"id":"CVE-2021-39306","description":"A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in the client code when an attacker sends a big size Authentication challenge text in WEP security.","status":"published","published":"2021-12-22T18:08:42Z","modified":"2024-08-04T02:06:41.543Z","updated_at":"2026-11-02T14:33:09.864034Z"}],"euvd":[{"id":"EUVD-2021-25667","description":"A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in the client code when an attacker sends a big size Authentication challenge text in WEP security.","status":"published","published":"2021-12-22T18:08:42Z","modified":"2024-08-04T02:06:41Z","updated_at":"2026-11-03T03:24:23.719378Z"}],"ghsa":[{"id":"GHSA-rcc4-26h9-5ggq","title":"A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in...","description":"A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in the client code when an attacker sends a big size Authentication challenge text in WEP security.","status":"published","published":"2021-12-23T00:00:49Z","modified":"2023-02-03T05:02:53Z","cwes":["CWE-787"],"updated_at":"2026-11-02T14:53:15.265364Z"}],"nvd":[{"id":"CVE-2021-39306","description":"A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in the client code when an attacker sends a big size Authentication challenge text in WEP security.","status":"published","published":"2021-12-22T19:15:11.373Z","modified":"2026-06-17T04:03:30.83Z","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":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:07:02.566991Z"}]}}