CVE-2026-16401

Privilege escalation in the Data Loss Prevention component

High · published July 21, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
11.2
In the wild
Unconfirmed
What it is

Privilege escalation in the Data Loss Prevention component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00214 · 11.2th percentile
Published
2026-07-21T12:38Z
EPSS history
Timeline
  • 21 JUL 12:38Z
    Privilege escalation in the Data Loss Prevention component
    cvelistv5