CVE-2026-11744: PaperCut Hive RCE Vulnerability

CVE-2026-11744 Overview

CVE-2026-11744 is an input validation vulnerability in the PaperCut Hive embedded application for Ricoh multifunction devices. The application fails to sanitize data received during Near Field Communication (NFC) card reading before passing it to the embedded web view. An attacker with physical access to the device and a crafted NFC card or emulator can inject content that executes within the application's user interface context. Successful exploitation can lead to unauthorized actions or information disclosure on the embedded device. The weakness maps to [CWE-79] (Improper Neutralization of Input During Web Page Generation).

Critical Impact
A local attacker with physical access and a crafted NFC card can execute code in the context of the PaperCut Hive embedded web view, enabling unauthorized actions or information disclosure.

Affected Products

PaperCut Hive embedded application for Ricoh devices
Ricoh multifunction printers running the PaperCut Hive embedded client
Deployments using NFC card authentication through the PaperCut Hive integration

Discovery Timeline

2026-09-24 - CVE-2026-11744 published to the National Vulnerability Database
2026-09-24 - Last updated in NVD database

Technical Details for CVE-2026-11744

Vulnerability Analysis

The PaperCut Hive embedded application integrates with Ricoh multifunction devices to provide print release, user authentication, and job tracking. Users typically authenticate by tapping an NFC card against the device reader. The application reads data from the card and passes identifiers into the embedded web view that renders the device user interface.

The application does not neutralize characters that have special meaning in the web view rendering context. When an attacker presents a crafted NFC card containing script payloads, the payload reaches the web view without encoding. The web view then interprets the payload as executable content rather than as user data.

Because the injected content runs inside the embedded application's user interface, the attacker inherits whatever privileges and session context the embedded application holds. This can include access to print job metadata, cached credentials, or user session information surfaced through the interface.

Root Cause

The root cause is missing input sanitization at the boundary between the NFC input handler and the web view rendering layer. The application treats NFC card data as trusted authentication input and injects it directly into the DOM of the embedded interface. This is a classic [CWE-79] pattern applied to a non-browser input channel.

Attack Vector

Exploitation requires physical proximity to the Ricoh device. An attacker needs either a programmable NFC card or an NFC emulator capable of writing arbitrary values to the fields the PaperCut Hive application reads during authentication. No prior credentials, user interaction, or network access are required. The attacker taps the device, the card is read, and the injected payload is parsed by the web view. The physical access requirement limits the scalability of the attack but does not reduce impact on devices in semi-public environments such as lobbies, print rooms, and shared office floors.

No public proof-of-concept, exploit code, or exploitation activity has been reported. See the PaperCut Security Bulletin September 2026 for the vendor's technical description.

Detection Methods for CVE-2026-11744

Indicators of Compromise

Unexpected changes to the PaperCut Hive embedded UI, such as unfamiliar prompts, overlays, or redirects, during or after NFC card taps
Authentication events in PaperCut Hive logs that reference card identifiers containing HTML, JavaScript, or URL-encoded script fragments
Device-side errors or anomalous web view console entries following NFC read operations

Detection Strategies

Review PaperCut Hive authentication logs for card identifier fields that contain characters outside the expected alphanumeric range used by legitimate badges
Correlate NFC authentication events with subsequent anomalous print job submissions, configuration changes, or user profile lookups
Where available, enable verbose logging on the embedded application to capture the raw input passed to the web view layer

Monitoring Recommendations

Centralize PaperCut Hive and Ricoh device logs into a SIEM or data lake and alert on malformed card identifier patterns
Monitor physical access to devices in exposed locations using existing badge, camera, or facility access controls
Track firmware and application version inventory for Ricoh devices to confirm the PaperCut Hive client is current across the fleet

How to Mitigate CVE-2026-11744

Immediate Actions Required

Identify all Ricoh devices running the PaperCut Hive embedded application and inventory the installed version
Apply the fixed version of the PaperCut Hive embedded client as described in the PaperCut Security Bulletin September 2026
Review NFC authentication logs for signs of malformed card data since the application was deployed

Patch Information

PaperCut has released a fix as documented in the PaperCut Security Bulletin September 2026. Administrators should consult the bulletin for the specific fixed release of the PaperCut Hive embedded application for Ricoh devices and update affected devices through the standard PaperCut Hive deployment channel.

Workarounds

Temporarily disable NFC card authentication on affected Ricoh devices and require username and password or PIN entry until patches are applied
Restrict physical access to vulnerable devices by relocating them to monitored or access-controlled areas
Where NFC must remain enabled, limit badge issuance to vetted sources and periodically audit badge identifier values for anomalies

bash

# No vendor-provided configuration snippet is available for this CVE.
# Follow the remediation steps in the PaperCut Security Bulletin September 2026.