WISA Smart Wing CMS File Download Vulnerability

published 2022-08-17 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13433

cvss: 8.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

WISA corp. Smart Wing CMS r18715.20211229

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

WISA corp. Smart Wing CMS

Classification

Weakness

CWE-494 Download of Code Without Integrity Check
CWE-20 Improper Input Validation

References

krcert.or.kr /krcert/secNoticeView.do?bulletin_writing_sequence=66875
third-party-advisory

Sources

CVE List CVE-2021-26639
NVD CVE-2021-26639

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Summary