{"id":"CVE-2020-25855","aliases":["EUVD-2020-18488","GHSA-h76m-vvhh-g679"],"status":"published","title":"The function AES_UnWRAP() in the Realtek RTL8195A Wi-Fi Module prior to versions released in...","description":"The function AES_UnWRAP() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (up to and excluding 2.08) does not validate the size parameter for a memcpy() operation, resulting in a stack buffer overflow which can be exploited for remote code execution or denial of service. An attacker can impersonate an Access Point and attack a vulnerable Wi-Fi client, by injecting a crafted packet into the WPA2 handshake. The attacker needs to know the network's PSK in order to exploit this.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.0275,"percentile":0.86413,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121","CWE-787"],"published":"2021-02-03T16:49:05Z","modified":"2026-06-17T03:07:23Z","products":[{"vendor":"realtek","product":"rtl8195a_firmware"}],"references":[{"url":"https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-25855"},{"url":"https://github.com/advisories/GHSA-h76m-vvhh-g679"}],"sources":{"cve":[{"id":"CVE-2020-25855","description":"The function AES_UnWRAP() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (up to and excluding 2.08) does not validate the size parameter for a memcpy() operation, resulting in a stack buffer overflow which can be exploited for remote code execution or denial of service. An attacker can impersonate an Access Point and attack a vulnerable Wi-Fi client, by injecting a crafted packet into the WPA2 handshake. The attacker needs to know the network's PSK in order to exploit this.","status":"published","published":"2021-02-03T16:49:05Z","modified":"2024-08-04T15:49:05.976Z","cwes":["CWE-121"],"updated_at":"2026-11-02T14:35:48.52216Z"}],"euvd":[{"id":"EUVD-2020-18488","description":"The function AES_UnWRAP() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (up to and excluding 2.08) does not validate the size parameter for a memcpy() operation, resulting in a stack buffer overflow which can be exploited for remote code execution or denial of service. An attacker can impersonate an Access Point and attack a vulnerable Wi-Fi client, by injecting a crafted packet into the WPA2 handshake. The attacker needs to know the network's PSK in order to exploit this.","status":"published","published":"2021-02-03T16:49:05Z","modified":"2024-08-04T15:49:05Z","updated_at":"2026-11-03T03:07:16.308974Z"}],"ghsa":[{"id":"GHSA-h76m-vvhh-g679","title":"The function AES_UnWRAP() in the Realtek RTL8195A Wi-Fi Module prior to versions released in...","description":"The function AES_UnWRAP() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (up to and excluding 2.08) does not validate the size parameter for a memcpy() operation, resulting in a stack buffer overflow which can be exploited for remote code execution or denial of service. An attacker can impersonate an Access Point and attack a vulnerable Wi-Fi client, by injecting a crafted packet into the WPA2 handshake. The attacker needs to know the network's PSK in order to exploit this.","status":"published","published":"2022-05-24T17:40:54Z","modified":"2023-01-29T05:05:14Z","cwes":["CWE-787"],"updated_at":"2026-11-02T14:45:44.97547Z"}],"nvd":[{"id":"CVE-2020-25855","description":"The function AES_UnWRAP() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (up to and excluding 2.08) does not validate the size parameter for a memcpy() operation, resulting in a stack buffer overflow which can be exploited for remote code execution or denial of service. An attacker can impersonate an Access Point and attack a vulnerable Wi-Fi client, by injecting a crafted packet into the WPA2 handshake. The attacker needs to know the network's PSK in order to exploit this.","status":"published","published":"2021-02-03T17:15:15.043Z","modified":"2026-06-17T03:07:23.817Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-121","CWE-787"],"updated_at":"2026-11-02T14:06:34.188486Z"}]}}