CVE-2021-20730

Name: CVE-2021-20730
Creator: NVD / NIST
Published: 2021-06-09T02:15:06.75+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2021-20730 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Improper access control vulnerability in WSR-1166DHP3 firmware Ver.1.16 and prior and WSR-1166DHP4 firmware Ver.1.02 and prior allows an attacker to obtain configuration information via unspecified vectors.. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

Improper access control vulnerability in WSR-1166DHP3 firmware Ver.1.16 and prior and WSR-1166DHP4 firmware Ver.1.02 and prior allows an attacker to obtain configuration information via unspecified vectors.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.37%

28.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Buffalo	Wsr-1166dhp4 Firmware	<= 1.02
Buffalo	Wsr-1166dhp3 Firmware	<= 1.16

References

https://jvn.jp/en/vu/JVNVU92862829/index.htmlThird Party Advisory
https://www.buffalo.jp/news/detail/20210531-01.htmlVendor Advisory
https://jvn.jp/en/vu/JVNVU92862829/index.htmlThird Party Advisory
https://www.buffalo.jp/news/detail/20210531-01.htmlVendor Advisory

Timeline

Published: Jun 9, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20730?

How severe is CVE-2021-20730?

CVE-2021-20730 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20730?

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-2021-20730?

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

Scan your code now

Source: NVD / NIST