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

Quick assessment

Affected
Ricoh SP 330DN
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在理光（Ricoh）SP 330DN、SP 221、SP C252SF 以及 Aficio SP 3500SF 固件版本不晚于 20260813 的产品中，发现了一个安全漏洞。该漏洞影响 HTTP 多部分表单数据解析器（HTTP Multipart Form-Data Parser）的某个未知部分。利用该漏洞可导致拒绝服务（DoS）攻击。攻击者可远程实施此攻击。目前相关利用代码已在公开渠道发布，可能被用于实际攻击。尽管厂商在漏洞披露初期已被联系，但未作任何回应。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-101040

Vulnerability Information
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Vulnerability Title
Ricoh SP 330DN/SP 221/SP C252SF/Aficio SP 3500SF HTTP Multipart Form-Data denial of service
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当的资源关闭或释放
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Ricoh SP 330DN 20260813 cpe:2.3:a:ricoh:sp_330dn:*:*:*:*:*:*:*:*
Ricoh SP 221 20260813 cpe:2.3:a:ricoh:sp_221:*:*:*:*:*:*:*:*
Ricoh SP C252SF 20260813 cpe:2.3:a:ricoh:sp_c252sf:*:*:*:*:*:*:*:*
Ricoh Aficio SP 3500SF 20260813 cpe:2.3:a:ricoh:aficio_sp_3500sf:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-101040

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III. Intelligence Information for CVE-2026-101040

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Other References for CVE-2026-101040 (2)

IV. Related Vulnerabilities

Same vendor: Ricoh
Same weakness: CWE-404

V. Comments for CVE-2026-101040

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