Exposure of Sensitive Information

4.7 CVSS

Vulnerability Description

Successful exploitation of the vulnerability could allow an unauthenticated attacker to gain access to a victim’s Sync account data such as account credentials and email protection information.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Leng Kang Hao

References

Affected Vendor

DuckDuckGo

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Affected Software

DuckDuckGo Browser

Vulnerable Versions:

5.246.0 and below

Timeline

Official Publish: October 8th, 2025

Last Modified: October 8th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Weaknesses (CWE)

CWE-200

MITRE ATT&CK TTPs

T1213 Data from Information Repositories

Collection

T1005 Data from Local System