CVE-2026-57962: thunderbird before 140.12.1 (exclusive), before 152.0.1 (exclusive)

CVE-2026-57962. CVSS 3.1 base score 5.3 (MEDIUM, Source advisory). EPSS 0.0034 (percentile 0.26252), scored 24-Oct-2026.

Affected technology

thunderbird · before 140.12.1 (exclusive)
mozilla

thunderbird · before 152.0.1 (exclusive)
mozilla

Component: Not specified by the source

Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · User interaction required

What an attacker can do

Source advisory’s CVSS 3.1 assessment (base score 5.3/10) rates confidentiality and integrity impact as none; availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 25-Oct-2026 19:52 UTC

CWE: CWE-400
CCR priority: 21.3 /100 (P4)
CVSS 3.1: 5.3 /10 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H · Source advisory
EPSS: 0.0034 · percentile 0.27175 · 2026-10-25
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-25 19:52:47.952465+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-25 19:51:06.643138+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-57962.html