Overview Acer has confirmed it is actively developing fixes for two maximum‑severity zero‑day vulnerabilities affecting its Wave 7 mesh routers. Reported by security researcher Gergo Pap, these flaws impact devices running firmware version T7c_GBL_1.01.000055 or earlier, exposing users to remote credential theft and persistent backdoor injection.
Vulnerability Details
The two vulnerabilities — CVE‑2026‑49200 and CVE‑2026‑49201 — compromise both authentication integrity and data confidentiality.
| CVE ID | Type | Impact |
|---|---|---|
| CVE‑2026‑49200 | Broken Access Control | Unauthenticated access to plaintext credentials in acer_cgi.log |
| CVE‑2026‑49201 | Hardcoded Cryptographic Key | Persistent backdoor via decrypted and modified system backups |
CVE‑2026‑49200 — Broken Access Control
The acer_cgi.log file within the router’s firmware is accessible without authentication through the web interface. It contains cleartext login credentials for both web and Telnet access, enabling unauthorized system entry.
CVE‑2026‑49201 — Hardcoded AES Key
The upload.cgi binary, responsible for processing device backups, includes a hardcoded AES encryption key. Attackers can decrypt, modify, and re‑encrypt backups, injecting persistent backdoors that survive reboots.
Technical Insights
Both vulnerabilities stem from insecure development practices — plaintext credential storage and hardcoded keys — that violate basic secure coding principles.
Acer’s advisory confirms that no patches are yet available, but firmware updates are scheduled for release by end of June 2026.
“The vulnerabilities mentioned above are scheduled to be resolved in upcoming firmware updates. The target fix is planned for deployment by the end of June 2026,” Acer stated.
Mitigation Steps
Until official patches are released, Acer recommends the following interim measures:
- Disable remote management to prevent external access.
- Restrict remote access to trusted IPs if supported by firmware.
- Update firmware promptly once the patch is available.
- Audit router logs for suspicious entries.
Firmware update procedure:
- Connect your computer to the Acer Wave 7 router via Wi‑Fi or Ethernet.
- Open a browser and navigate to http://192.168.76.1 or http://acerconnect.com.
- Log in with administrator credentials.
- Go to System Management → Firmware Update → Check for Updates.
Expert in the Cloud Insight
The Wave 7 zero‑days highlight how embedded devices remain vulnerable to development oversights that can cascade into systemic security failures. A single hardcoded key or unprotected log file can expose entire networks to compromise.
For enterprises, the lesson is clear: router firmware is part of your attack surface. Continuous patch management, credential rotation, and network segmentation are essential to mitigate IoT and edge device risks.
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