CVE-2019-18852

Exp

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.

Published: 2019-11-11 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-18852 is rated High Exploit Risk (80.3/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.54%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.04% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2019-18852

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-18852

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.50% 1.54% +1.04%
2 2026-02-15 0.68% 0.50% -0.18%
3 2026-01-24 — 0.68% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-18852

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2019-18852

Affected software / configurations for CVE-2019-18852

Vendor Product Version Raw CPE
dlink dir-600_b1_firmware 2.01 cpe:2.3:o:dlink:dir-600_b1_firmware:2.01:*:*:*:*:*:*:*
dlink dir-615_j1_firmware 100 cpe:2.3:o:dlink:dir-615_j1_firmware:100:*:*:*:*:*:*:*
dlink dir-645_a1_firmware 1.03 cpe:2.3:o:dlink:dir-645_a1_firmware:1.03:*:*:*:*:*:*:*
dlink dir-815_a1_firmware 1.01 cpe:2.3:o:dlink:dir-815_a1_firmware:1.01:*:*:*:*:*:*:*
dlink dir-823_a1_firmware 1.01 cpe:2.3:o:dlink:dir-823_a1_firmware:1.01:*:*:*:*:*:*:*
dlink dir-842_c1_firmware 3.00 cpe:2.3:o:dlink:dir-842_c1_firmware:3.00:*:*:*:*:*:*:*
dlink dir-890l_a1_firmware 1.03 cpe:2.3:o:dlink:dir-890l_a1_firmware:1.03:*:*:*:*:*:*:*

References for CVE-2019-18852

cvelogic Threat Intelligence