HOMEVULNERABILITIESCVE-2018-6211
HIGH

CVE-2018-6211

CWE-78Published: June 20, 2018· Updated: Jun 17, 2026

7.2
CVSS v3.1

Official Description

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, OS command injection is possible as a result of incorrect processing of the res_buf parameter to index.cgi.

NVD Source

Technical Analysis

CVE-2018-6211 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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 7.2.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:H/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-2018-6211
CVSS Score7.2 / 10
SeverityHIGH
WeaknessCWE-78
CISA KEVNo
Affected2 vendor(s)
PublishedJun 20, 2018

Related CVEs (CWE-78)

CVE-2010-0418
10.0
CVE-2010-2445
10.0
CVE-2008-4304
10.0
CVE-2008-6554
10.0
CVE-2014-6434
10.0
CVE-2012-6592
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-6211 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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