CVE-2021-41286
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedOmikron MultiCash Desktop 4.00.008.SP5 relies on a client-side authentication mechanism. When a user logs into the application, the validity of the password is checked locally. All communication to the database backend is made via the same technical account. Consequently, an attacker can attach a debugger to the process or create a patch that manipulates the behavior of the login function. When the function always returns the success value (corresponding to a correct password), an attacker can login with any desired account, such as the administrative account of the application.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceOmikron MultiCash Desktop 4.00.008.SP5 performs password validation entirely on the client-side. The application sends all database queries using a single technical account regardless of which user is logged in. An attacker can bypass authentication by debugging the process or patching the login function to always return success, enabling access to any account including administrative ones.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 4.00.008CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify installed version of Omikron MultiCashCheck the application version by opening the About dialog in the MultiCash Desktop application, or look for version information in the program's installation directory or Windows Add/Remove Programs. Typical version file locations may include the main executable's properties or a version info file in the program folder.Affected if The installed version is exactly 4.00.008.SP5 (or specifically version 4.00.008)
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Inspect application configuration for authentication settingsExamine configuration files in the MultiCash installation directory for connection strings, authentication parameters, or database access settings. Look for files with extensions like .ini, .cfg, .xml, or .config that may contain connection parameters.Affected if Configuration files show a single shared technical account credential used for all database connections rather than user-specific credentials.
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Monitor network traffic during loginUse a network sniffer or proxy tool to capture traffic when logging into the application. Observe whether the authentication request is sent to a remote server or processed locally within the client application.Affected if Login requests are processed entirely client-side without any server validation, or no authentication request is sent to a backend server during login.
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Examine application binaries for client-side validation logicInspect the application executable and DLL files for strings or logic that indicate password validation occurs locally. Tools like strings or a debugger may reveal hardcoded validation routines.Affected if The application contains password validation logic that executes locally without server communication, indicating client-side authentication.
A user is affected if they are running version 4.00.008 and the application performs authentication entirely on the client side without server validation or uses a single shared technical account for all database access.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataReplace client-side password validation with proper server-side authentication. Implement user-specific credentials for database access and enforce authentication validation at the backend before granting any access to protected resources.
- Consultation8.0 h
- Implementation40.0 h
- Testing16.0 h
- Review / QA8.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-41286 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-41286 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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