CVE-2026-2832: Samsung MultiXpress Information Disclosure

CVE-2026-2832 Overview

CVE-2026-2832 is an information disclosure vulnerability affecting certain Samsung MultiXpress Multifunction Printers. The vulnerability allows unauthorized access to sensitive device information, including address book entries and device configuration data, through specific APIs that lack proper authorization controls.

Critical Impact

Attackers on an adjacent network can access sensitive address book entries and device configuration information without authentication, potentially exposing organizational contact data and revealing printer security configurations.

Affected Products

• Samsung MultiXpress Multifunction Printers (specific models detailed in HP Security Bulletin)

Discovery Timeline

• 2026-02-20 - CVE-2026-2832 published to NVD
• 2026-02-20 - Last updated in NVD database

Technical Details for CVE-2026-2832

Vulnerability Analysis

This vulnerability is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). The affected Samsung MultiXpress printers expose certain API endpoints that do not implement proper authorization checks, allowing attackers to retrieve sensitive information without providing valid credentials.

The adjacent network attack vector means an attacker must have access to the same network segment as the vulnerable printer. This could include scenarios where an attacker gains access to a corporate network through physical access, compromised wireless credentials, or other network intrusion methods. Once on the adjacent network, the attacker can query the vulnerable APIs to extract address book data and device configuration details.

Root Cause

The root cause of this vulnerability is improper access control implementation in the printer's web service APIs. The affected APIs fail to verify that requests originate from authenticated and authorized users before returning sensitive data. This lack of authorization enforcement allows any device on the adjacent network to query these endpoints and retrieve information that should be protected.

Attack Vector

The vulnerability requires adjacent network access, meaning the attacker must be positioned on the same local network segment as the target printer. The attack does not require user interaction or authentication credentials. An attacker can send crafted HTTP requests to the printer's API endpoints to retrieve:

• Address book entries containing contact names, email addresses, and phone numbers
• Device configuration settings including network parameters
• Other potentially sensitive operational data

The exploitation process involves identifying vulnerable Samsung MultiXpress printers on the network and sending unauthenticated API requests to extract the exposed information. For detailed technical information, refer to the HP Security Bulletin.

Detection Methods for CVE-2026-2832

Indicators of Compromise

• Unusual or frequent HTTP requests to printer API endpoints from non-administrative workstations
• Network traffic patterns showing data extraction from printer devices to unauthorized hosts
• Log entries showing API access attempts from unfamiliar IP addresses on the local network
• Increased network traffic to/from multifunction printers outside normal usage patterns

Detection Strategies

• Monitor network traffic for unusual API requests directed at Samsung MultiXpress printers
• Implement network segmentation monitoring to detect lateral movement toward printer resources
• Deploy intrusion detection rules to flag unauthenticated API access attempts to printer devices
• Review printer access logs regularly for anomalous request patterns

Monitoring Recommendations

• Enable comprehensive logging on all multifunction printer devices where supported
• Implement network-level monitoring for traffic destined to printer management interfaces
• Configure alerts for API access from unauthorized network segments
• Establish baseline printer network behavior to identify deviations

How to Mitigate CVE-2026-2832

Immediate Actions Required

• Review the HP Security Bulletin for affected models and recommended actions
• Isolate vulnerable Samsung MultiXpress printers on a dedicated network segment with restricted access
• Implement network access controls to limit which devices can communicate with printers
• Disable unnecessary network services and APIs on affected devices until patches are applied

Patch Information

Refer to the HP Security Bulletin for official firmware updates and patch availability for affected Samsung MultiXpress Multifunction Printers.

Workarounds

• Place affected printers on isolated VLANs with strict access control lists (ACLs)
• Restrict printer management interface access to authorized administrative workstations only
• Implement firewall rules to block unauthorized network access to printer API ports
• Consider disabling web services on affected printers if not required for business operations

# Example network segmentation configuration (generic router/firewall)
# Restrict access to printer subnet from untrusted networks
# Consult your specific device documentation for exact commands

# Allow only authorized admin workstation to access printer management
iptables -A FORWARD -s 192.168.10.100 -d 192.168.20.0/24 -p tcp --dport 80 -j ACCEPT
iptables -A FORWARD -s 192.168.10.100 -d 192.168.20.0/24 -p tcp --dport 443 -j ACCEPT

# Block all other hosts from accessing printer management interfaces
iptables -A FORWARD -d 192.168.20.0/24 -p tcp --dport 80 -j DROP
iptables -A FORWARD -d 192.168.20.0/24 -p tcp --dport 443 -j DROP