AUGUST 21, 2026
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Case File

CVE-2026-74989

CRITICAL · CVSS 9.8 EPSS 0.15% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-18 · Last synced 2026-08-21

CyberRota Analysis

AI-Generated

Firefox 153 contains internally identified bugs that may lead to memory corruption and other security-related issues, potentially allowing for exploitation under certain conditions. Users and organizations relying on Firefox 153 should prioritize upgrading to version 154 to mitigate any risks associated with these vulnerabilities.

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-2026-74989
Severity
CRITICAL
CVSS
9.8
EPSS
0.15%
Firefox

Original NVD Description

Internally found bugs present in Thunderbird 153. 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 154 and Thunderbird 154.

Related CVEs

Other vulnerabilities affecting the same vendor(s)