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CVE-2021-22917

22
FAUCET Score

CVE-2021-22917 describes an information disclosure vulnerability in Brave Browser Desktop versions 1.17 through 1.20. When adblocking was enabled in Tor windows, DNS requests would bypass the Tor network, potentially revealing a user's IP address or browsing activity. This medium-severity vulnerability (CVSS 6.5) requires user interaction (UI:R) and could lead to high confidentiality impact (C:H). There is no evidence of active exploitation, nor are there publicly available exploit codes or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
> 1.17, < 1.20CPE matchmatch criteria
cpe:2.3:a:brave:browser:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.23%
Probability of exploitation in next 30 days
EPSS Percentile
65.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0123 is in the 78th percentile among its peer group of 26,221 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

hackerone.com / reports/1077022
Third Party Advisory