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Acer Wave 7 Router Zero-Day Vulnerabilities (CVE-2026-49200 & CVE-2026-49201)

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CVE-2026-49200 CVE-2026-49201 Zero-Day Router Security

Overview

Acer disclosed two maximum-severity zero-day vulnerabilities affecting Acer Wave 7 mesh routers. The flaws could allow attackers to steal credentials, gain unauthorized access, and establish persistent backdoors on vulnerable devices.

Technical Specifications

Attribute Details
CVE IDs CVE-2026-49200, CVE-2026-49201
Affected Product Acer Wave 7 mesh router
Affected Firmware T7c_GBL_1.01.000055 and earlier
CVE-2026-49200 Unauthenticated access to acer_cgi.log exposing plaintext administrator and Telnet credentials
CVE-2026-49201 Hardcoded AES key in backup restoration (upload.cgi) enabling decryption, tampering, and malicious backup upload
Attack Requirements Network reachability to exposed management/log endpoints
Authentication Requirement Not required for initial credential exposure path
Exploitation Impact Credential theft, privileged access, persistent compromise, and network abuse potential
CVSS Severity Reported as maximum severity in vendor/security reporting

Affected Products

  • Acer Wave 7 mesh routers running firmware version T7c_GBL_1.01.000055 or earlier
  • Deployments exposing management interfaces or related services to untrusted networks
  • Environments with Telnet enabled and weak perimeter controls

Attack Scenario

  1. The attacker scans the internet for exposed Acer Wave 7 routers.
  2. The attacker accesses an exposed log file without authentication.
  3. Administrator and Telnet credentials are extracted from plaintext log data.
  4. The attacker logs into the router management interface.
  5. A tampered backup configuration is uploaded using the hardcoded AES key weakness.
  6. Persistent access is established and DNS settings or traffic handling are modified.
  7. The compromised router is used for interception, lateral movement, or botnet activity.

Impact

  • Full compromise of router configuration and trusted network controls
  • Persistent unauthorized changes through malicious backup restoration
  • DNS manipulation and policy tampering that alters normal network behavior
  • Theft of administrative and Telnet credentials from exposed logs
  • Potential interception of internal network traffic through compromised routing infrastructure
  • Increased risk of data exposure during attacker-controlled network redirection
  • Service instability or disruption due to malicious configuration changes
  • Potential outage scenarios from unauthorized firmware/config operations
  • Botnet recruitment and malware distribution affecting local and upstream network reliability

Mitigations

Immediate Actions

  • Disable remote management access where possible
  • Restrict admin access to trusted IP addresses only
  • Change all administrator and Telnet passwords immediately
  • Disable Telnet services if unnecessary

Short-term Measures

  • Avoid exposing router management interfaces directly to the internet
  • Apply Acer firmware updates immediately once released
  • Harden router access controls and administrative workflows

Monitoring & Detection

  • Monitor for unauthorized configuration changes
  • Alert on suspicious outbound traffic patterns from router devices
  • Audit authentication attempts and anomalous management-plane activity

Long-term Solutions

  • Segment critical internal systems from consumer/edge routing infrastructure
  • Establish continuous vulnerability management for network edge devices
  • Enforce secure configuration baselines and periodic credential rotation for network appliances

Resources

Official and Open-Source Reporting

Last Updated: June 7, 2026