CVE-2025-4093

HIGH EPSS 30.5%
Published Apr 29, 20251y ago · Modified Jun 17, 20261w ago
8.1 CVSS 3.1
High
Find Similar
Published Apr 29, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.1
Exploitability
2.2
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
30.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Memory Safety

Affected Products 2

VendorProductVersionRange
mozillafirefox* <128.10
mozillathunderbird* <128.10.0

References 4

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1894100
    Permissions Required
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-29/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-32/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.