CVE-2021-26639: This vulnerability is caused by the lack of validation of input values for specific functions if WISA Smart Wi

Q: How do I fix CVE-2021-26639?

smart wing cms: upgrade to r18715.20211229. Exact commands for each OS are on this page.

Q: Is CVE-2021-26639 being exploited?

CVE-2021-26639 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-26639 affect?

CVE-2021-26639 affects smart wing cms. Severity is high (CVSS 8.1). 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.

Routine

HIGH 8.1UPGRADE

CVE-2021-26639 is a high-severity flaw (CVSS 8.1) affecting smart wing cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-20, CWE-494
Published	2022-08-17
Last modified	2026-06-17

Publisher (CNA): KrCERT/CC · Vendor: wisa

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-08-17 21:15 UTCPublished CVE record published
2026-06-17 03:43 UTCUpdated Record last modified

wisa smart wing cms UPGRADE

Affected: < r18715.20211229

Fixed in: r18715.20211229

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy smart-wing-cms || rpm -q smart-wing-cms || smart-wing-cms --version

2. UPGRADE to r18715.20211229 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade smart-wing-cms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade smart-wing-cms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-26639?

smart wing cms: upgrade to r18715.20211229. Exact commands for each OS are on this page.

Is CVE-2021-26639 being exploited?

CVE-2021-26639 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-26639 affect?

CVE-2021-26639 affects smart wing cms. Severity is high (CVSS 8.1). 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.

How urgent is CVE-2021-26639?

Priority 38/100. High severity

Related CVEs

CVE-2022-23770 HIGH 8.8 UPGRADE This vulnerability could allow a remote attacker to execute remote commands with improper validation of parame

References

← Back to latest CVEs