CVE-2024-36249: Sharp & Toshiba MFP XSS Vulnerability

CVE-2024-36249 Overview

CVE-2024-36249 is a Cross-Site Scripting (XSS) vulnerability [CWE-79] affecting multifunction printers (MFPs) manufactured by Sharp Corporation and Toshiba Tec Corporation. The flaw resides in the administrative web interface of the affected devices. An attacker who tricks an authenticated administrator into visiting a crafted link can execute arbitrary script in the context of the MFP administrative page. Successful exploitation allows attackers to manipulate device configuration, exfiltrate session data, or pivot into adjacent enterprise systems through the compromised administrator session.

Critical Impact
Arbitrary script execution on the administrative page of affected Sharp and Toshiba Tec MFPs, enabling session hijacking, configuration tampering, and lateral movement within enterprise print infrastructure.

Affected Products

Sharp Corporation multifunction printers (refer to Sharp security advisory for full model and firmware list)
Toshiba Tec Corporation multifunction printers (refer to Toshiba Tec advisory for full model and firmware list)
Administrative web interface components on affected MFP firmware

Discovery Timeline

2024-11-26 - CVE-2024-36249 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-36249

Vulnerability Analysis

The vulnerability is a Cross-Site Scripting flaw [CWE-79] in the web-based administrative console embedded in affected Sharp and Toshiba Tec MFPs. The administrative interface fails to properly neutralize user-supplied input before rendering it back into HTML pages served to administrators. An attacker who induces an authenticated administrator to interact with a crafted request can execute arbitrary JavaScript inside the admin's browser session. The attack vector is network-based and requires user interaction, and the scope is changed, meaning the impact extends beyond the vulnerable component to the administrator's browser context.

Root Cause

The root cause is improper neutralization of input during web page generation in the MFP administrative interface. Input passed through specific request parameters is reflected or stored in HTML responses without adequate output encoding or context-aware sanitization. This allows attacker-controlled content to be interpreted as executable script by the administrator's browser.

Attack Vector

The attack is delivered over the network and requires the targeted administrator to perform an action — typically clicking a crafted URL or visiting a malicious page that issues a request against the MFP admin interface. Once the script executes, it runs with the privileges of the administrator session. Attackers can read or modify printer configuration, harvest session tokens, alter network settings, redirect print jobs, or use the device as a foothold for further attacks against the internal network.

No verified public proof-of-concept code is available. Consult the JVN Security Vulnerability Report, the Sharp Global Security Information, and the Toshiba Tec Security Update for vendor-specific technical details.

Detection Methods for CVE-2024-36249

Indicators of Compromise

Unexpected HTTP requests to MFP administrative endpoints containing HTML or JavaScript metacharacters such as <script>, onerror=, or javascript: in query strings or form fields.
Administrator sessions originating from unusual source IP addresses or making configuration changes outside normal operating hours.
Modifications to MFP settings such as scan-to-email destinations, LDAP bindings, or address book entries with no corresponding change-management record.

Detection Strategies

Inspect web proxy and network logs for requests to MFP management URLs containing reflected payload patterns characteristic of XSS attempts.
Correlate browser referer headers in administrator workstation telemetry with MFP admin interface URLs to identify cross-origin script delivery.
Deploy signatures on network intrusion detection systems for known XSS payload structures targeting Sharp and Toshiba Tec admin endpoints.

Monitoring Recommendations

Segment MFP management interfaces onto a restricted VLAN and log all administrative HTTP/HTTPS access for retention and review.
Forward MFP web server logs and administrator workstation telemetry into a centralized analytics platform for cross-source correlation.
Alert on changes to MFP firmware version, administrator account inventory, and outbound connections initiated from printer management subnets.

How to Mitigate CVE-2024-36249

Immediate Actions Required

Apply the firmware updates published by Sharp and Toshiba Tec for each affected MFP model as identified in the vendor advisories.
Restrict access to MFP administrative interfaces to a dedicated management network and authorized administrator workstations only.
Require administrators to log out of the MFP management console after each session and avoid browsing untrusted web content from the same browser profile.

Patch Information

Sharp Corporation and Toshiba Tec Corporation have released firmware updates addressing CVE-2024-36249. Specific fixed firmware versions and model coverage are documented in the Sharp Global Security Information, the Sharp Japan Print Security Notice, and the Toshiba Tec Information Announcement. Administrators should consult these advisories to map their device model and current firmware to the appropriate patched release.

Workarounds

Block access to MFP administrative web interfaces from general user subnets using firewall or VLAN access control lists until firmware is updated.
Disable remote administration features where not required and require administrators to manage devices from the physical console.
Train administrators to avoid clicking unsolicited links while authenticated to MFP management consoles and to use dedicated browsers for device administration.

bash

# Configuration example: restrict MFP admin interface access at the network layer
# Replace MFP_IP and MGMT_SUBNET with environment-specific values
iptables -A FORWARD -s MGMT_SUBNET -d MFP_IP -p tcp --dport 443 -j ACCEPT
iptables -A FORWARD -d MFP_IP -p tcp --dport 443 -j DROP
iptables -A FORWARD -d MFP_IP -p tcp --dport 80 -j DROP