Vulnerability · NVD

CVE-2026-74965

HIGH 8.8 Published on 2026-08-18

Privilege escalation in the Shell Integration component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

Attack vector : Network No privileges required

Show raw CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Mozilla Thunderbird Windows winget:Mozilla.Thunderbird

Affected ≥153.0 <153.1.0 Fixed in 153.1.0 Latest tracked 153.0.3 still vulnerable

Observed affected builds (128)

153.0.3 153.0.2 153.0.1 153.0 152.0.1 152.0 151.0.1 151.0 150.0.2 150.0.1 150.0 149.0.2 149.0.1 149.0 148.0.1 148.0 147.0.2 147.0.1 147.0 146.0.1 146.0 145.0 144.0.1 144.0 143.0.1 143.0 142.0 141.0 140.0.1 140.0 +98 · see history

Vulnerable CPE configurations (3)

Vendor	Product	Platform	Versions	CPE 2.3 URI
mozilla	thunderbird All platforms (wildcard)	All platforms (wildcard)	<140.14.0	cpe:2.3:a:mozilla:thunderbird:::::esr:::*
mozilla	thunderbird All platforms (wildcard)	All platforms (wildcard)	<154.0	cpe:2.3:a:mozilla:thunderbird:::::-:::*
mozilla	thunderbird All platforms (wildcard)	All platforms (wildcard)	≥153.0 <153.1.0	cpe:2.3:a:mozilla:thunderbird:::::esr:::*

View on NVD ↗ Advisory · www.mozilla.org