# CVE-2021-26625: tobesoft Nexacro arbitrary file download vulnerability

> Remote attackers can exploit insufficient input validation in the automatic update function to download and execute arbitrary malicious files.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 19 Apr 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-26r2-6q54-995j

## What is CVE-2021-26625?

CVE-2021-26625 is a high-severity path traversal vulnerability in tobesoft Co.,Ltd Nexacro 17, published on 19 Apr 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Insufficient Verification of input Data leading to arbitrary file download and execute was discovered in Nexacro platform. This vulnerability is caused by an automatic update function that does not verify input data except version information. Remote attackers can use this incomplete validation logic to download and execute arbitrary malicious file.

Weakness: CWE-345 (Insufficient Verification of Data Authenticity)

## Which versions are affected by CVE-2021-26625?

It affects 1 product.


Products: Tobesoft Nexacro.

## How do I fix CVE-2021-26625?

No fix has been published for CVE-2021-26625 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26625 being exploited?

There is no known exploitation of CVE-2021-26625 in the wild and no public exploit code.

## Other vulnerabilities in tobesoft Co.,Ltd Nexacro 17

- [CVE-2020-7874](https://insights.sbomify.com/CVE-2020-7874/): NEXACRO14 Runtime arbitrary file download and execution vulnerability (high 8.8)
- [CVE-2021-26613](https://insights.sbomify.com/CVE-2021-26613/): tobesoft nexacro arbitrary file creation vulnerability (high 8.1)
- [CVE-2021-26612](https://insights.sbomify.com/CVE-2021-26612/): tobesoft Nexacro platform arbitrary file creation vulnerability (high 8.1)
- [CVE-2021-26607](https://insights.sbomify.com/CVE-2021-26607/): TOBESOFT NEXACRO17 arbitrary command execution vulnerability (high 8.1)
- [CVE-2019-19167](https://insights.sbomify.com/CVE-2019-19167/): Tobesoft Nexacro14 ActiveX File Download Vulnerability (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26625 and fix it if it is affected.

What it is: CVE-2021-26625 is a high-severity path traversal vulnerability in tobesoft Co.,Ltd Nexacro 17, published on 19 Apr 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-26625 in the wild and no public exploit code.

Affected product: tobesoft Co.,Ltd Nexacro 17. 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-2021-26625/ (Markdown: https://insights.sbomify.com/CVE-2021-26625/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26625
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26625
- OSV: https://osv.dev/vulnerability/CVE-2021-26625

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-26625/
Summaries are generated and may contain mistakes; the official description above is the record.