CVE-2019-18852

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-11-11 · updated 2026-06-17
Weakness: CWE-319

Description

Certain D-Link devices have a hardcoded Alphanetworks user account with TELNET access because of /etc/config/image_sign or /etc/alpha_config/image_sign. This affects DIR-600 B1 V2.01 for WW, DIR-890L A1 v1.03, DIR-615 J1 v100 (for DCN), DIR-645 A1 v1.03, DIR-815 A1 v1.01, DIR-823 A1 v1.01, and DIR-842 C1 v3.00.

Affected products

Dlink Dir-600 B1 Firmware: 2.01
Dlink Dir-615 J1 Firmware: 100
Dlink Dir-645 A1 Firmware: 1.03
Dlink Dir-815 A1 Firmware: 1.01
Dlink Dir-823 A1 Firmware: 1.01
Dlink Dir-842 C1 Firmware: 3.00
Dlink Dir-890L A1 Firmware: 1.03

References

https://github.com/ChandlerChin/Dlink_vuls/blob/master/A%20hard%20coded%20telnet%20user%20was%20discovered%20in%20multiple%20Dlink%20routers.pdf
https://github.com/ChandlerChin/Dlink_vuls/blob/master/A%20hard%20coded%20telnet%20user%20was%20discovered%20in%20multiple%20Dlink%20routers.pdf

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