SEPTEMBER 7, 2026
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Case File

CVE-2026-84144

HIGH · CVSS 7.5 EPSS 0.24% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-01 · Last synced 2026-09-07

CyberRota Analysis

AI-Generated

Firefox versions 154 and ESR 153.1 contain internally identified bugs that may lead to memory corruption or other security-related issues, potentially allowing exploitation under certain conditions. Users and organizations relying on these versions should prioritize upgrading to Firefox 155 or ESR 153.2 to mitigate any associated risks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-84144
Severity
HIGH
CVSS
7.5
EPSS
0.24%
Firefox

Original NVD Description

Internally found bugs present in Thunderbird 154 and Thunderbird ESR 153.1. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. 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)