# CVE-2020-36881: Flexsense DiskBoss 'Add Input Directory' Buffer Overflow

> Local attackers can execute arbitrary code by pasting a crafted path into the Add Input Directory field in Flexsense DiskBoss.

- **Severity:** High 8.6 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Dec 2025
- **Updated:** 8 Dec 2025
- **Also known as:** GHSA-w59w-3fq8-w77h

## What is CVE-2020-36881?

CVE-2020-36881 is a high-severity memory corruption vulnerability in Flexsense DiskBoss, published on 5 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Flexsense DiskBoss 7.7.14 contains a local buffer overflow vulnerability in the 'Input Directory' component that allows unauthenticated attackers to execute arbitrary code on the system. Attackers can exploit this by pasting a specially crafted directory path into the 'Add Input Directory' field.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2020-36881?

It affects 1 product.


Products: Flexense Diskboss.

## How do I fix CVE-2020-36881?

No fix has been published for CVE-2020-36881 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-36881 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36881 exists.

## Other vulnerabilities in Flexsense DiskBoss

- [CVE-2018-5262](https://insights.sbomify.com/CVE-2018-5262/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-36882](https://insights.sbomify.com/CVE-2020-36882/): Flexsense DiskBoss Application Crash Denial of Service (high 8.7)
- [CVE-2020-36880](https://insights.sbomify.com/CVE-2020-36880/): Flexsense DiskBoss 'Reports and Data Directory' Buffer Overflow (high 8.6)
- [CVE-2018-5261](https://insights.sbomify.com/CVE-2018-5261/): Weak cryptography in n/a (high 8.1)
- [CVE-2017-7310](https://insights.sbomify.com/CVE-2017-7310/): Memory corruption in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-36881 and fix it if it is affected.

What it is: CVE-2020-36881 is a high-severity memory corruption vulnerability in Flexsense DiskBoss, published on 5 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36881 exists.

Affected product: Flexsense DiskBoss. 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-2020-36881/ (Markdown: https://insights.sbomify.com/CVE-2020-36881/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36881
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36881
- OSV: https://osv.dev/vulnerability/CVE-2020-36881

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-36881/
Summaries are generated and may contain mistakes; the official description above is the record.