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CVE-2018-6212

22
FAUCET Score

CVE-2018-6212 describes a reflected Cross-Site Scripting (XSS) vulnerability in specific ISP-customized firmware versions of D-Link DIR-620 routers, stemming from insufficient input validation in the "Search" field. This medium-severity vulnerability (CVSS 6.1) can be exploited remotely with low attack complexity, requiring user interaction, and could lead to limited confidentiality and integrity impacts. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered some community discussion and media coverage, including reports of a separate backdoor account in these devices.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.3CPE matchmatch criteria
cpe:2.3:o:d-link:dir-620_firmware:1.0.3:*:*:*:*:*:*:*
1.0.37CPE matchmatch criteria
cpe:2.3:o:d-link:dir-620_firmware:1.0.37:*:*:*:*:*:*:*
1.3.1CPE matchmatch criteria
cpe:2.3:o:d-link:dir-620_firmware:1.3.1:*:*:*:*:*:*:*
1.3.3CPE matchmatch criteria
cpe:2.3:o:d-link:dir-620_firmware:1.3.3:*:*:*:*:*:*:*
1.3.7CPE matchmatch criteria
cpe:2.3:o:d-link:dir-620_firmware:1.3.7:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.76%
Probability of exploitation in next 30 days
EPSS Percentile
75.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0176 is in the 87th percentile among its peer group of 26,209 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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