CVE-2025-64310: EPSON Projector Auth Bypass Vulnerability

CVE-2025-64310 Overview

EPSON WebConfig and Epson Web Control for SEIKO EPSON Projector Products contain a critical authentication vulnerability that fails to restrict excessive authentication attempts. This security flaw allows attackers to identify administrative user passwords through brute force attacks, potentially leading to complete compromise of affected projector devices and their management interfaces.

Critical Impact

Attackers can perform unrestricted brute force attacks against administrative accounts, potentially gaining full control over EPSON projector systems and their network configurations.

Affected Products

• EPSON WebConfig for SEIKO EPSON Projector Products
• Epson Web Control for SEIKO EPSON Projector Products
• SEIKO EPSON Projector Products with web-based management interfaces

Discovery Timeline

• 2025-11-21 - CVE-2025-64310 published to NVD
• 2025-12-23 - Last updated in NVD database

Technical Details for CVE-2025-64310

Vulnerability Analysis

This vulnerability is classified under CWE-307 (Improper Restriction of Excessive Authentication Attempts). The EPSON WebConfig and Epson Web Control interfaces lack fundamental security controls to prevent brute force authentication attacks. Without rate limiting, account lockout mechanisms, or progressive delays between failed login attempts, attackers can systematically test password combinations until successful authentication is achieved.

The network-accessible nature of these web management interfaces significantly increases the attack surface. Any attacker with network access to the projector's management interface can launch automated credential-guessing attacks without encountering defensive countermeasures. This is particularly concerning in enterprise environments where projectors are often deployed on corporate networks with minimal network segmentation.

Root Cause

The root cause of this vulnerability lies in the absence of authentication throttling mechanisms within the EPSON WebConfig and Epson Web Control applications. The web interfaces process login requests without tracking failed attempts, implementing account lockouts, or introducing delays after consecutive failures. This architectural oversight allows unlimited authentication attempts, making brute force attacks trivially easy to execute.

Attack Vector

The attack vector is network-based, requiring the attacker to have network connectivity to the vulnerable EPSON projector's web management interface. An attacker would identify projectors exposing WebConfig or Web Control interfaces on the network, then use automated tools to systematically attempt authentication with common passwords, dictionary-based wordlists, or targeted credential lists. Due to the lack of rate limiting, these attacks can be executed at high speed, potentially compromising weak administrative passwords within minutes.

The attack does not require any prior authentication or special privileges. No user interaction is needed, making this vulnerability particularly dangerous for projectors accessible from untrusted network segments or the internet.

Detection Methods for CVE-2025-64310

Indicators of Compromise

• High volume of HTTP/HTTPS requests to projector web management interfaces from a single source IP
• Repeated POST requests to authentication endpoints with varying credentials
• Multiple failed authentication events in rapid succession in device logs
• Unusual access patterns to projector management interfaces outside normal business hours

Detection Strategies

• Monitor network traffic for anomalous request rates targeting projector management ports (typically HTTP/HTTPS)
• Implement network-based intrusion detection rules to identify brute force patterns against web authentication endpoints
• Deploy SIEM correlation rules to alert on multiple failed authentication attempts from single sources
• Use SentinelOne Singularity to detect and correlate suspicious network scanning and authentication attack behaviors

Monitoring Recommendations

• Enable verbose logging on EPSON projector web interfaces where available
• Centralize logs from projector devices to a security monitoring platform
• Establish baseline metrics for normal authentication activity to identify anomalous spikes
• Consider deploying network monitoring between projector VLANs and user networks

How to Mitigate CVE-2025-64310

Immediate Actions Required

• Review network segmentation and restrict access to projector management interfaces to authorized administrative systems only
• Implement strong, unique passwords for all EPSON projector administrative accounts
• Deploy network-level access controls (firewall rules, ACLs) to limit which hosts can reach projector web interfaces
• Consider disabling web-based management interfaces if not operationally required

Patch Information

Consult the Epson Security Notice and Epson FAQ on Security for firmware updates and official guidance from Epson. Additionally, review the JVN Vulnerability Report for detailed advisory information and recommended remediation steps.

Workarounds

• Isolate affected projectors on dedicated network segments with strict access controls
• Deploy a reverse proxy or web application firewall (WAF) in front of management interfaces to implement rate limiting
• Require VPN access for all remote management of projector devices
• Disable external network access to projector management interfaces entirely where feasible

# Example firewall rule to restrict projector management access (iptables)
# Allow only specific management workstation to access projector web interface
iptables -A INPUT -p tcp --dport 80 -s 192.168.1.100 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 192.168.1.100 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP