Medium severity · published Jul 20, 2026
CVE-2026-42210
Webmin 2FA requirement bypass
5.3
CVSS
0.5%
EPSS
No
On KEV
Description
Webmin is a web-based system administration tool for Unix-like servers. Prior to version 2.640, for Webmin accounts that require a second authentication factor (typically TOTP), an attacker with knowledge of the username and password can bypass the 2FA requirement by using Basic authentication. Webmin is a web-based system administration tool for Unix-like servers. As a workaround, apply the patch from commit da18a16c84ae5c0b78cad79609cb0efb174000ec manually.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WE
webmin · webmin
< 2.640 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42210
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42210
github.com
https://github.com/webmin/webmin/commit/da18a16c84ae5c0b78cad79609cb0efb174000ec
github.com
https://github.com/webmin/webmin/security/advisories/GHSA-qpww-fff2-6fgv
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