CVE-2021-26639

Name: CVE-2021-26639
Creator: NVD / NIST
Published: 2022-08-17T21:15:08.487+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2021-26639 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. This vulnerability is caused by the lack of validation of input values for specific functions if WISA Smart Wing CMS. Remote attackers can use this vulnerability to leak all files in the server without logging in system.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

This vulnerability is caused by the lack of validation of input values for specific functions if WISA Smart Wing CMS. Remote attackers can use this vulnerability to leak all files in the server without logging in system.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.39%

31.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Wisa	Smart Wing Cms	< r18715.20211229

References

https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66875Third Party Advisory
https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66875Third Party Advisory

Timeline

Published: Aug 17, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26639?

How severe is CVE-2021-26639?

CVE-2021-26639 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26639?

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-2021-26639?

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

Scan your code now

Source: NVD / NIST