Read the docs
TI-2026-30531 Aliases CVE-2026-42210

Webmin 2FA requirement bypass

Priority LOW 25CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00521 44th percentileScored 2026-11-07
Fix Fixed webmin (webmin): 2.640

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Webminwebminbefore 2.6402.640Patch availableCNA
  • webmin VendorWebmin Affected before 2.640 Fixed in 2.640 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:webmin:webmin:*:*:*:*:*:*:*:*——Webmin
  • cpe:2.3:a:webmin:webmin:*:*:*:*:*:*:*:* Versions — — ·Webmin

Remediation

  • Fix · CNA webmin (webmin) Fixed in 2.640

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42210

References

Other 2

  • TI-2019-11278 An issue was discovered in Webmin <=1.920. KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-16770 software/apt-lib.pl in Webmin before 1.997 lacks HTML escaping for a UI command. CVSS 3.1CRITICAL 9.8
  • TI-2022-00731 Improper Access Control to Remote Code Execution in webmin/webmin CVSS 3.1HIGH 8.8
  • TI-2019-09619 In Webmin through 1.910, any user authorized to the "Package Updates" module can execute… CVSS 3.0HIGH 8.8
  • TI-2015-01866 Code injection in Usermin CVSS 3.1CRITICAL 9.9
  • TI-2022-15852 Usermin through 1.850 allows a remote authenticated user to execute OS commands via… CVSS 3.1HIGH 8.8
See all 121 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences