CVE-2021-43573

Name: CVE-2021-43573
Creator: NVD / NIST
Published: 2021-11-11T04:15:06.47+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.07%

Last modified Jun 17, 2026

CVE-2021-43573 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A buffer overflow was discovered on Realtek RTL8195AM devices before 2.0.10. It exists in the client code when processing a malformed IE length of HT capability information in the Beacon and Association response frame.. EPSS estimates a 1.07% chance of exploitation in the next 30 days.

Description

A buffer overflow was discovered on Realtek RTL8195AM devices before 2.0.10. It exists in the client code when processing a malformed IE length of HT capability information in the Beacon and Association response frame.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.07%

60.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Realtek	Rtl8195am Firmware	<= 2.0.10

References

https://www.amebaiot.com/en/security_bulletin/cve-2021-43573/Third Party Advisory
https://www.amebaiot.com/en/security_bulletin/cve-2021-43573/Third Party Advisory

Timeline

Published: Nov 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43573?

How severe is CVE-2021-43573?

CVE-2021-43573 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.07% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43573?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43573?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST