# CVE-2021-34606: XINJE XD/E Series PLC Program Tool DLL Hijacking

> Local attackers can execute arbitrary code via DLL hijacking in XINJE PLC programming tools, requiring file-write access to the system.

- **Severity:** High 7.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 11 May 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-cgc9-524g-5jwr

## What is CVE-2021-34606?

CVE-2021-34606 is a high-severity vulnerability in XINJE XD/E Series PLC Program Tool, published on 11 May 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A vulnerability exists in XINJE XD/E Series PLC Program Tool in versions up to v3.5.1 that can allow an authenticated, local attacker to load a malicious DLL. Local access is required to successfully exploit this vulnerability. This means the potential attacker must have access to the system and sufficient file-write privileges. If exploited, the attacker could place a malicious DLL file on the system, that when running XINJE XD/E Series PLC Program Tool will allow the attacker to execute arbitrary code with the privileges of another user's account.

Weakness: CWE-427 (Uncontrolled Search Path Element)

## Which versions are affected by CVE-2021-34606?

It affects 1 product.


Products: Xinje Xd\/E Series Plc Program Tool.

## How do I fix CVE-2021-34606?

No fix has been published for CVE-2021-34606 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-34606 being exploited?

There is no known exploitation of CVE-2021-34606 in the wild and no public exploit code.

## Other vulnerabilities in XINJE XD/E Series PLC Program Tool

- [CVE-2021-34605](https://insights.sbomify.com/CVE-2021-34605/): Xinje XD/E Series PLC Program Tool Zip Slip (high 7.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-34606 and fix it if it is affected.

What it is: CVE-2021-34606 is a high-severity vulnerability in XINJE XD/E Series PLC Program Tool, published on 11 May 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-34606 in the wild and no public exploit code.

Affected product: XINJE XD/E Series PLC Program Tool. 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-2021-34606/ (Markdown: https://insights.sbomify.com/CVE-2021-34606/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-34606
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-34606
- OSV: https://osv.dev/vulnerability/CVE-2021-34606

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-34606/
Summaries are generated and may contain mistakes; the official description above is the record.