VDB-380683 · CVE-2026-42210 · EUVD-2026-46035

Webmin up to 2.639 2FA privilege escalation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.1	$0-$5k	1.05

Summaryinfo

A vulnerability identified as critical has been detected in Webmin up to 2.639. The affected element is an unknown function of the component 2FA. This manipulation causes Remote Privilege Escalation. This vulnerability appears as CVE-2026-42210. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in Webmin up to 2.639. Affected by this vulnerability is some unknown functionality of the component 2FA. The manipulation with an unknown input leads to a remote privilege escalation vulnerability. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-42210 since 04/25/2026. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 2.640 eliminates this vulnerability. Applying the patch da18a16c84ae5c0b78cad79609cb0efb174000ec is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-46035). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Software Management Software

Name

Webmin

Version

2.639

License

open-source

Website

Product: https://github.com/webmin/webmin/

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.4
VulDB Temp Score: 7.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Webmin 2.640
Patch: da18a16c84ae5c0b78cad79609cb0efb174000ec

Timelineinfo

04/25/2026 CVE reserved
07/20/2026 +86 days Advisory disclosed
07/20/2026 +0 days VulDB entry created
07/20/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-42210 (🔒)
GCVE (CVE): GCVE-0-2026-42210
GCVE (VulDB): GCVE-100-380683
EUVD: 🔒

Entryinfo

Created: 07/20/2026 19:42
Updated: 07/20/2026 21:58
Changes: 07/20/2026 19:42 (53), 07/20/2026 21:58 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.