SEPTEMBER 15, 2026
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Case File

CVE-2026-84134

CRITICAL · CVSS 9.8 EPSS 0.31%

Source: NVD + CISA KEV + EPSS · Published 2026-09-01 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

A vulnerability in the Profile Backup component of Firefox could potentially compromise user data during backup operations. Users of affected versions should prioritize updating to Firefox 155 or Firefox ESR 153.2 to mitigate any risks associated with this issue.

CVE
CVE-2026-84134
Severity
CRITICAL
CVSS
9.8
EPSS
0.31%
Firefox

Original NVD Description

Other issue in the Profile Backup component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-84642 HIGH CVE-2026-84641 HIGH CVE-2026-84640 HIGH CVE-2026-84639 CRITICAL CVE-2026-84637 CRITICAL CVE-2026-84145 HIGH