HOMEVULNERABILITIESCVE-2019-18852
CRITICAL

CVE-2019-18852

CWE-319Published: November 11, 2019· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2019-18852 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

dlink14 product(s)
dir-600 b1 firmwaredir-600 b1dir-615 j1 firmwaredir-615 j1dir-645 a1 firmwaredir-645 a1dir-815 a1 firmwaredir-815 a1dir-823 a1 firmwaredir-823 a1dir-842 c1 firmwaredir-842 c1+2
Source: NVD CPE · 14 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

All References (2)

→
https://github.com/ChandlerChin/Dlink_vuls/blob/master/A%20hard%20coded%20telnet%20user%20was%20discovered%20in%20multiple%20Dlink%20routers.pdfExploit · Third Party Advisory
→
https://github.com/ChandlerChin/Dlink_vuls/blob/master/A%20hard%20coded%20telnet%20user%20was%20discovered%20in%20multiple%20Dlink%20routers.pdfExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2019-18852
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-319
CISA KEVNo
Affected1 vendor(s)
PublishedNov 11, 2019

Related CVEs (CWE-319)

CVE-2025-4378
10.0
CVE-2025-47419
10.0
CVE-2025-34271
9.8
CVE-2022-3929
9.8
CVE-2023-32328
9.8
CVE-2018-7259
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-18852 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2019-18852·NVD