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.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
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
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.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-101040 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101040 exists.
Sources
Also known as GHSA-7hj2-7h7h-f38x.