CVE-2020-25854
8.1 · HIGHOverview
CVE-2020-25854 is a high-severity vulnerability affecting realtek rtl8195a_firmware. It was published on February 3, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
The function DecWPA2KeyData() 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 internal function, rt_arc4_crypt_veneer() or _AES_UnWRAP_veneer(), 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.
Remediation
Check the references section for vendor advisories and patches from realtek. Update rtl8195a_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| realtek | rtl8195a_firmware | >= 0, < 2.08 | Affected |
Frequently Asked Questions
What is CVE-2020-25854?
CVE-2020-25854 is a high-severity vulnerability affecting realtek rtl8195a_firmware. It was published on February 3, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).
How severe is CVE-2020-25854?
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-25854?
Check the references section for vendor advisories and patches from realtek. Update rtl8195a_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-25854?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-25854 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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