VULNERABILITY INTELLIGENCE

CVE-2020-25857

CVSS score7.5 HIGH
EPSS probability1.24%
CISA KEVNot currently listed
Published2021-02-03
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

The function ClientEAPOLKeyRecvd() 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 an rtl_memcpy() operation, resulting in a stack buffer overflow which can be exploited for 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 does not need to know the network's PSK.

Weakness classification

  • vuln@vdoo.com: CWE-121
  • nvd@nist.gov: CWE-787

Primary references