# CVE-2021-40853: TCMAN GIM missing authorization vulnerability

> Remote attackers can access privileged resources without authorization, potentially exposing sensitive information in TCMAN GIM.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Dec 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-g4wc-2gqq-5g7v

## What is CVE-2021-40853?

CVE-2021-40853 is a high-severity missing authorization vulnerability in TCMAN GIM, published on 17 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

TCMAN GIM does not perform an authorization check when trying to access determined resources. A remote attacker could exploit this vulnerability to access URL that require privileges without having them. The exploitation of this vulnerability might allow a remote attacker to obtain sensible information.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2021-40853?

It affects 1 product.


Products: Tcman Gim.

## How do I fix CVE-2021-40853?

No fix has been published for CVE-2021-40853 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-40853 being exploited?

There is no known exploitation of CVE-2021-40853 in the wild and no public exploit code.

## Other vulnerabilities in TCMAN GIM

- [CVE-2021-40850](https://insights.sbomify.com/CVE-2021-40850/): TCMAN GIM SQL injection vulnerability (critical 10.0)
- [CVE-2022-36276](https://insights.sbomify.com/CVE-2022-36276/): SQL injection vulnerability in TCMAN GIM (critical 9.9)
- [CVE-2025-40664](https://insights.sbomify.com/CVE-2025-40664/): Missing authentication vulnerability in TCMAN GIM v11 (critical 9.3)
- [CVE-2025-40620](https://insights.sbomify.com/CVE-2025-40620/): Multiple vulnerabilities in TCMAN's GIM (critical 9.3)
- [CVE-2025-40621](https://insights.sbomify.com/CVE-2025-40621/): Multiple vulnerabilities in TCMAN's GIM (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-40853 and fix it if it is affected.

What it is: CVE-2021-40853 is a high-severity missing authorization vulnerability in TCMAN GIM, published on 17 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-40853 in the wild and no public exploit code.

Affected product: TCMAN GIM. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-40853/ (Markdown: https://insights.sbomify.com/CVE-2021-40853/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-40853
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-40853
- OSV: https://osv.dev/vulnerability/CVE-2021-40853

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-40853/
Summaries are generated and may contain mistakes; the official description above is the record.