# CVE-2026-101040: Ricoh SP 330DN/SP 221/SP C252SF/Aficio SP 3500SF HTTP Multipart Form-Data denial of service

> Remote attackers can cause a denial of service on Ricoh multifunction printers by exploiting a flaw in the HTTP Multipart Form-Data parser.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Sep 2026
- **Updated:** 1 Oct 2026
- **Also known as:** GHSA-7hj2-7h7h-f38x

## What is CVE-2026-101040?

CVE-2026-101040 is a high-severity denial of service vulnerability in Ricoh Aficio SP 3500SF, published on 28 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A security flaw has been discovered in Ricoh SP 330DN, SP 221, SP C252SF and Aficio SP 3500SF up to 20260813. This affects an unknown part of the component HTTP Multipart Form-Data Parser. Performing a manipulation results in denial of service. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2026-101040?


## How do I fix CVE-2026-101040?

No fix has been published for CVE-2026-101040 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-101040 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101040 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-101040 and fix it if it is affected.

What it is: CVE-2026-101040 is a high-severity denial of service vulnerability in Ricoh Aficio SP 3500SF, published on 28 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101040 exists.

Affected product: Ricoh Aficio SP 3500SF. 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-2026-101040/ (Markdown: https://insights.sbomify.com/CVE-2026-101040/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-101040
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-101040
- OSV: https://osv.dev/vulnerability/CVE-2026-101040

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-101040/
Summaries are generated and may contain mistakes; the official description above is the record.