CVE-2026-60011 Overview
CVE-2026-60011 affects Sharp and Toshiba Tec multifunction printers (MFPs). The devices fail to properly authorize requests that directly access certain image data stored on the product. A remote, unauthenticated attacker can retrieve stored image data over the network without valid credentials. The weakness maps to CWE-425: Direct Request (Forced Browsing). Impact is limited to confidentiality of stored image data; integrity and availability are not affected according to the published CVSS vector.
Critical Impact
Unauthenticated network attackers can retrieve scanned, printed, or copied image data stored on affected Sharp and Toshiba Tec MFPs by issuing direct requests that bypass authorization checks.
Affected Products
- Sharp multifunction printers (MFPs) — see Sharp Product Security Advisory 2026-004 for the model list
- Toshiba Tec multifunction printers (MFPs) — see Toshiba Tec Security News 20260731-01
- Additional affected models are enumerated in JVN Vulnerability Report JVNVU98759887
Discovery Timeline
- 2026-08-03 - CVE-2026-60011 published to NVD
- 2026-08-03 - Last updated in NVD database
Technical Details for CVE-2026-60011
Vulnerability Analysis
The vulnerability is an authorization flaw in the request-handling logic of affected Sharp and Toshiba Tec MFPs. Specific endpoints that serve stored image data do not verify whether the requester holds the required session, role, or access token. An attacker who can reach the MFP over the network can request image resources directly and receive them without authenticating. Because the flaw is exercised through normal HTTP-style requests to the device, no exploit tooling or user interaction is required. The condition falls under CWE-425: Direct Request (Forced Browsing), where sensitive resources are reachable by guessable or known URIs.
Root Cause
The device firmware exposes image storage endpoints that rely on obscurity rather than server-side authorization. Requests directed at these endpoints are served without validating session state or user privilege. The result is an Insecure Direct Object Reference against scanned, printed, or faxed image objects stored on the MFP.
Attack Vector
Exploitation requires network reachability to the MFP's management or web interface. An attacker sends crafted requests to the image-serving endpoints identified in the vendor advisories. No credentials, tokens, or user interaction are required. MFPs exposed to the internet or to untrusted network segments are at highest risk. See the Sharp Security Advisory 2026-004 and Toshiba Tec Information Update 20260731_01 for endpoint-specific technical detail.
Detection Methods for CVE-2026-60011
Indicators of Compromise
- Unauthenticated HTTP or HTTPS requests to MFP image-retrieval paths originating from unexpected internal or external hosts.
- Successful 200 OK responses returning image content without a preceding authentication exchange in device access logs.
- Spikes in outbound traffic volume from MFPs to non-print client IP addresses.
Detection Strategies
- Review MFP web server and access logs for direct requests to image-object URIs that lack an associated authenticated session.
- Compare source IPs of image-retrieval requests against the known set of print servers, workflow servers, and administrator workstations.
- Alert on any MFP HTTP interface access from outside dedicated printing VLANs or management subnets.
Monitoring Recommendations
- Enable and centralize MFP audit logging where supported by the firmware, and forward to a SIEM for retention.
- Baseline normal image-retrieval patterns per device so that anomalous access frequency or volume is detectable.
- Monitor perimeter and internal firewalls for any inbound connections to MFP TCP ports 80, 443, and vendor-specific management ports.
How to Mitigate CVE-2026-60011
Immediate Actions Required
- Apply the firmware updates published by Sharp and Toshiba Tec for the specific MFP model. Refer to Sharp Product Security Advisory 2026-004 and Toshiba Tec Security News 20260731-01.
- Remove MFP web interfaces from the public internet and restrict access to a dedicated print management VLAN.
- Purge stored image data (scan boxes, held print jobs, fax mailboxes) that is no longer required on affected devices.
Patch Information
Sharp and Toshiba Tec have issued firmware fixes and coordinated the disclosure through JPCERT/CC. Model-specific firmware versions and download links are listed in the vendor advisories: Sharp Security Advisory 2026-004, Toshiba Tec Information Update 20260731_01, and the aggregated JVN Vulnerability Report JVNVU98759887.
Workarounds
- Restrict inbound access to MFP HTTP, HTTPS, and vendor management ports using network access control lists until firmware can be applied.
- Disable remote and web-based scan retrieval features on the device where the workflow does not require them.
- Require authenticated user login at the panel and enforce per-user document mailboxes with automatic deletion after retrieval.
# Example: restrict MFP web management to an admin subnet only
# (adapt interface names and subnets to your environment)
iptables -A FORWARD -p tcp -s 10.10.20.0/24 -d 10.50.10.15 --dport 443 -j ACCEPT
iptables -A FORWARD -p tcp -d 10.50.10.15 --dport 443 -j DROP
iptables -A FORWARD -p tcp -d 10.50.10.15 --dport 80 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
