CVE-2021-40851
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 · uneditedTCMAN GIM is vulnerable to a lack of authorization in all available webservice methods listed in /PC/WebService.asmx. The exploitation of this vulnerability might allow a remote attacker to obtain information.
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 · moderate confidenceTCMAN GIM has a missing authorization vulnerability across all webservice methods exposed at /PC/WebService.asmx. An unauthenticated remote attacker can invoke these methods to access sensitive information without proper authorization checks.
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= 8.0= 11.0CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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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Identify TCMAN GIM installation and versionLocate the TCMAN GIM installation directory and check the version information, typically found in product documentation, installed packages, or the application itselfAffected if The installed version is 8.0 or 11.0
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Verify the WebService.asmx endpoint existsCheck if the file /PC/WebService.asmx exists in the web root or application directory of the TCMAN GIM installationAffected if The WebService.asmx file is present in the expected location
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Confirm webservice methods are exposedAccess the URL /PC/WebService.asmx in a browser or via HTTP request to view the list of available webservice methodsAffected if The endpoint responds and exposes webservice methods without requiring authentication
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Test unauthenticated access to webservice methodsAttempt to invoke one or more webservice methods at /PC/WebService.asmx without providing any authentication credentialsAffected if The webservice methods can be invoked successfully without any authorization token, credentials, or session
A user is affected if they have TCMAN GIM version 8.0 or 11.0 with the /PC/WebService.asmx endpoint accessible and exploitable without authentication.
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 dataImplement and enforce role-based or resource-based authorization checks on all webservice methods to ensure only authorized users can access specific functionality and data.
- Consultation4.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,040.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-40851 — 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-2021-40851 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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