CVE-2026-6777

5.3 MEDIUM

Published: April 21, 2026 Modified: April 22, 2026

Description

Other issue in the Networking: DNS component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

0.0 Low Medium High Critical 10.0

Vector String

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

Patch Vendor Advisory Exploit Third Party Advisory

Source: security@mozilla.org

Permissions Required

Source: security@mozilla.org

Vendor Advisory

Source: security@mozilla.org

Vendor Advisory

3 reference(s) from NVD

CVSS v3 Score

5.3 / 10.0

EPSS (Exploit Probability)

0.2%

6th percentile

Exploitation Status

Not in CISA KEV

CWE-20 CWE-352 CWE-400

mozilla