HOMEVULNERABILITIESCVE-2018-6213
CRITICAL

CVE-2018-6213

CWE-798Published: June 20, 2018· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

In the web server on D-Link DIR-620 devices with a certain customized (by ISP) variant of firmware 1.0.3, 1.0.37, 1.3.1, 1.3.3, 1.3.7, 1.4.0, and 2.0.22, there is a hardcoded password of anonymous for the admin account.

NVD Source

Technical Analysis

CVE-2018-6213 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-link1 product(s)
dir-620 firmware
dlink1 product(s)
dir-620
Source: NVD CPE · 8 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

ADVISORYhttp://www.securitynewspaper.com/2018/05/25/d-link-dir-620-routers-critical-vulnerabilities/
ADVISORYhttps://securelist.com/backdoors-in-d-links-backyard/85530/
ADVISORYhttps://securityaffairs.co/wordpress/72839/hacking/d-link-dir-620-flaws.html
ADVISORYhttps://www.bleepingcomputer.com/news/security/backdoor-account-found-in-d-link-dir-620-routers/
ADVISORYhttp://www.securitynewspaper.com/2018/05/25/d-link-dir-620-routers-critical-vulnerabilities/
ADVISORYhttps://securelist.com/backdoors-in-d-links-backyard/85530/
ADVISORYhttps://securityaffairs.co/wordpress/72839/hacking/d-link-dir-620-flaws.html
ADVISORYhttps://www.bleepingcomputer.com/news/security/backdoor-account-found-in-d-link-dir-620-routers/

All References (8)

→
http://www.securitynewspaper.com/2018/05/25/d-link-dir-620-routers-critical-vulnerabilities/Third Party Advisory
→
https://securelist.com/backdoors-in-d-links-backyard/85530/Exploit · Third Party Advisory
→
https://securityaffairs.co/wordpress/72839/hacking/d-link-dir-620-flaws.htmlThird Party Advisory
→
https://www.bleepingcomputer.com/news/security/backdoor-account-found-in-d-link-dir-620-routers/Third Party Advisory
→
http://www.securitynewspaper.com/2018/05/25/d-link-dir-620-routers-critical-vulnerabilities/Third Party Advisory
→
https://securelist.com/backdoors-in-d-links-backyard/85530/Exploit · Third Party Advisory
→
https://securityaffairs.co/wordpress/72839/hacking/d-link-dir-620-flaws.htmlThird Party Advisory
→
https://www.bleepingcomputer.com/news/security/backdoor-account-found-in-d-link-dir-620-routers/Third Party Advisory

Quick Facts

CVE IDCVE-2018-6213
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-798
CISA KEVNo
Affected2 vendor(s)
PublishedJun 20, 2018

Related CVEs (CWE-798)

CVE-2026-22769
KEV10.0
CVE-2025-20309
10.0
CVE-2023-1748
10.0
CVE-2021-40519
10.0
CVE-2025-48748
10.0
CVE-2026-49201
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-6213 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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