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CVE-2018-6849

51
FAUCET Score

CVE-2018-6849 describes a private IP address disclosure vulnerability in the WebRTC component of DuckDuckGo 4.2.0. This medium-severity vulnerability (CVSS 4.3) allows a remote attacker to obtain a user's private IP address through a STUN request after the user visits a specially crafted website. While not actively exploited in the wild (no KEV entry), a Metasploit module exists for exploitation, and its FAUCET Risk Score of 99/100 indicates a high potential for impact despite minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.2.0CPE matchmatch criteria
cpe:2.3:a:duckduckgo:duckduckgo:4.2.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
30.14%
Probability of exploitation in next 30 days
EPSS Percentile
98.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Metasploit: HTTP Client LAN IP Address Gather · Sep 5, 2013
ExploitDB: EDB-44403 · Apr 5, 2018
This CVE's current EPSS score of 0.3014 is in the 99th 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

No media coverage found for this CVE.

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

datarift.blogspot.com / p/private-ip-leakage-using-webrtc.html
Third Party Advisory
github.com / rapid7/metasploit-framework/pull/9538
Issue TrackingThird Party Advisory
news.ycombinator.com / item
Third Party Advisory
voidsec.com / vpn-leak
Third Party Advisory
exploit-db.com / exploits/44403
ExploitThird Party AdvisoryVDB Entry