D-Link DIR-605L Hardware Revision A1 (End-of-Life, EOL) contains a hardcoded telnet backdoor. The device starts a telnet daemon at boot via /bin/telnetd.sh with the username "Alphanetworks" and the static password "wrgn35_dlwbr_dir605l" read from /etc/alpha_config/image_sign. The custom telnetd binary accepts a -u user:password flag, and the custom login binary uses strcmp() to validate credentials. Successful authentication grants an unauthenticated attacker on the local network a root shell with full administrative control. The device has reached End-of-Life (EOL) and will not receive patches.
References
| Link | Resource |
|---|---|
| https://www.securin.io/zero-day/cve-2026-42372-hardcoded-telnet-backdoor-in-d-link-dir-605l-a1-end-of-life- | Exploit Third Party Advisory |
| https://www.securin.io/zero-day/cve-2026-42372-hardcoded-telnet-backdoor-in-d-link-dir-605l-a1-end-of-life- | Exploit Third Party Advisory |
Configurations
Configuration 1 (hide)
| AND |
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History
06 May 2026, 12:20
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:dlink:dir-605l_firmware:*:*:*:*:*:*:*:* cpe:2.3:h:dlink:dir-605l:a1:*:*:*:*:*:*:* |
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| References | () https://www.securin.io/zero-day/cve-2026-42372-hardcoded-telnet-backdoor-in-d-link-dir-605l-a1-end-of-life- - Exploit, Third Party Advisory | |
| First Time |
Dlink dir-605l
Dlink Dlink dir-605l Firmware |
04 May 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-04 17:16
Updated : 2026-05-06 12:20
NVD link : CVE-2026-42372
Mitre link : CVE-2026-42372
CVE.ORG link : CVE-2026-42372
JSON object : View
Products Affected
dlink
- dir-605l
- dir-605l_firmware
CWE
CWE-798
Use of Hard-coded Credentials