CVE-2026-10521Network attack vector

Parameter tampering via hidden configuration method

Published Jun 23, 2026 · Updated Jun 23, 2026

Authorization bypass in MB connect line mbCONNECT24 and mymbCONNECT24 before 2.20.2 allows remote authenticated users to modify critical parameters. A hidden configuration method accepts direct requests from high-privilege accounts even though no user role should be authorized to call it. Calling it permits changes to unspecified critical program parameters, with reported complete loss of data confidentiality, integrity, and service availability.

CVSS severity8.6
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in MB connect line mbCONNECT24 and mymbCONNECT24 before 2.20.2 allows remote authenticated users to modify critical parameters. A hidden configuration method accepts direct requests from high-privilege accounts even though no user role should be authorized to call it. Calling it permits changes to unspecified critical program parameters, with reported complete loss of data confidentiality, integrity, and service availability.

The record

CVE
CVE-2026-10521
Published
Jun 23, 2026
Updated
Jun 23, 2026
Vendor
MB connect line
Product
mbCONNECT24
Classifications
CWE-425, CAPEC-87
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.0.0 <2.20.2
  2. Affected versionversion=2.20.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

MB connect line · mbCONNECT24version=0.0.0 <2.20.2; version=2.20.1
MB connect line · mymbCONNECT24version=0.0.0 <2.20.2; version=2.20.1

Published CVSS scores

8.6CERTVDECVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.2CERTVDECVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-425Direct Request ('Forced Browsing')
CAPEC-87Forceful Browsing

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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