HOMEVULNERABILITIESCVE-2018-20389
CRITICAL

CVE-2018-20389

CWE-522Published: December 23, 2018· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

D-Link DCM-604 DCM604_C1_ViaCabo_1.04_20130606 and DCM-704 EU_DCM-704_1.10 devices allow remote attackers to discover credentials via iso.3.6.1.4.1.4491.2.4.1.1.6.1.1.0 and iso.3.6.1.4.1.4491.2.4.1.1.6.1.2.0 SNMP requests.

NVD Source

Technical Analysis

CVE-2018-20389 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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

d-link2 product(s)
dcm-604 firmwaredcm-704 firmware
dlink2 product(s)
dcm-604dcm-704
Source: NVD CPE · 4 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/ezelf/sensitivesOids/blob/master/oidpassswordleaks.csv
ADVISORYhttps://misteralfa-hack.blogspot.com/2018/12/stringbleed-y-ahora-que-passwords-leaks.html
ADVISORYhttps://github.com/ezelf/sensitivesOids/blob/master/oidpassswordleaks.csv
ADVISORYhttps://misteralfa-hack.blogspot.com/2018/12/stringbleed-y-ahora-que-passwords-leaks.html

All References (4)

→
https://github.com/ezelf/sensitivesOids/blob/master/oidpassswordleaks.csvThird Party Advisory
→
https://misteralfa-hack.blogspot.com/2018/12/stringbleed-y-ahora-que-passwords-leaks.htmlExploit · Third Party Advisory
→
https://github.com/ezelf/sensitivesOids/blob/master/oidpassswordleaks.csvThird Party Advisory
→
https://misteralfa-hack.blogspot.com/2018/12/stringbleed-y-ahora-que-passwords-leaks.htmlExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2018-20389
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-522
CISA KEVNo
Affected2 vendor(s)
PublishedDec 23, 2018

Related CVEs (CWE-522)

CVE-2026-29128
10.0
CVE-2024-12799
10.0
CVE-2021-36783
9.9
CVE-2019-1384
9.9
CVE-2026-56843
9.9
CVE-2025-0867
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-20389 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.
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