CVE-2025-4093

HighCVSS 8.1/10Last modified Oct 5, 2026

Description

Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.10 and Thunderbird 128.10.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Apr 29, 2025
Last modified
Oct 5, 2026
NVD status
Modified

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CVE-2025-4093: High severity, CVSS 8.1 | Vulnix