CVE-2025-64310: EPSON Projector Auth Bypass Vulnerability

CVE-2025-64310 Overview

CVE-2025-64310 affects EPSON WebConfig and Epson Web Control interfaces used to administer SEIKO EPSON projector products. The interfaces do not restrict excessive authentication attempts, allowing attackers to brute force administrative credentials over the network. An attacker who recovers the administrator password gains full control over projector configuration and administrative functions. The weakness is tracked under [CWE-307: Improper Restriction of Excessive Authentication Attempts].

Critical Impact
A network-based attacker without prior credentials can brute force the administrator password and obtain full administrative control of affected EPSON projectors.

Affected Products

EPSON WebConfig for SEIKO EPSON Projector Products
Epson Web Control for SEIKO EPSON Projector Products
Refer to the Epson Support Notice for the model list

Discovery Timeline

2025-11-21 - CVE-2025-64310 published to the National Vulnerability Database (NVD)
2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-64310

Vulnerability Analysis

The EPSON WebConfig and Epson Web Control administrative interfaces accept authentication requests without enforcing a limit on failed login attempts. An attacker can submit unlimited password guesses against the administrator account. Because the interface is reachable over the network and requires no prior credentials or user interaction, automated tooling can iterate through password dictionaries against the projector's HTTP management endpoint.

Successful credential recovery yields administrator-level access. From that position, an attacker can alter projector configuration, change network settings, modify display content, disable security controls, and pivot through the device's network position.

Root Cause

The root cause is the absence of rate limiting, account lockout, or progressive delay mechanisms on the authentication handler within the WebConfig and Web Control interfaces. The interfaces evaluate each authentication request independently, with no tracking of failed attempts per source address or per account.

Attack Vector

The attack is network-based and unauthenticated. The attacker needs HTTP or HTTPS reachability to the projector's management interface. Many projectors are deployed on internal networks with default credentials or short administrator passwords, which compresses the brute force search space. Exposed devices on the public internet face direct exploitation; devices on flat enterprise networks face lateral attack from any compromised host.

No verified public exploit code is currently available. The technique relies on standard HTTP authentication brute force tooling against the documented administrative endpoint.

Detection Methods for CVE-2025-64310

Indicators of Compromise

High volumes of HTTP POST requests to the projector's WebConfig or Web Control login endpoint from a single source
Successful administrative login from an unusual source IP shortly after a burst of failed attempts
Unexpected configuration changes on the projector, including modified network settings, firmware update URLs, or content sources
Outbound connections from projectors to addresses outside their normal operational pattern

Detection Strategies

Inspect HTTP access logs at network proxies and firewalls for repeated authentication requests to projector management URLs
Deploy network detection rules that alert on more than N failed HTTP 401 or 403 responses per minute against projector IP ranges
Baseline projector network behavior and alert on deviations in administrative access patterns
Correlate authentication events with source IP reputation to identify scanning infrastructure

Monitoring Recommendations

Forward firewall and network flow logs covering projector VLANs into a centralized analytics platform for retention and correlation
Monitor for projectors becoming reachable from untrusted networks or the public internet
Alert on first-seen administrative sessions from new source addresses
Track firmware versions across the projector fleet to confirm patch coverage

How to Mitigate CVE-2025-64310

Immediate Actions Required

Remove projector management interfaces from internet exposure and restrict access to a dedicated management VLAN
Replace default and weak administrator passwords with long, randomly generated values
Apply firmware updates from Epson as soon as they become available for affected models
Audit projector inventory and identify all devices running WebConfig or Web Control

Patch Information

Epson has published guidance through the JVN Advisory JVNVU95021911 and the Epson FAQ on Security. Consult the Epson Support Notice for model-specific firmware availability and update procedures.

Workarounds

Place projectors behind network access control lists that permit management traffic only from authorized administrator workstations
Disable WebConfig and Web Control on devices where remote administration is not required
Enforce strong password policies and rotate administrator credentials on a defined schedule
Where supported, terminate management traffic through a reverse proxy that enforces rate limiting and IP allowlisting in front of the projector

bash

# Example: restrict projector management access using iptables on a gateway
# Replace 10.10.20.0/24 with the projector VLAN and 10.10.5.10 with the admin host
iptables -A FORWARD -s 10.10.5.10 -d 10.10.20.0/24 -p tcp --dport 80 -j ACCEPT
iptables -A FORWARD -s 10.10.5.10 -d 10.10.20.0/24 -p tcp --dport 443 -j ACCEPT
iptables -A FORWARD -d 10.10.20.0/24 -p tcp --dport 80 -j DROP
iptables -A FORWARD -d 10.10.20.0/24 -p tcp --dport 443 -j DROP