CVE-2026-2447
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
3Description
Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, Firefox ESR < 115.32.1, Thunderbird < 140.7.2, and Thunderbird < 147.0.2.
Analysis
Heap buffer overflow in libvpx affects Firefox and Thunderbird across multiple versions, enabling remote code execution when a user interacts with malicious content. An unauthenticated attacker can exploit this vulnerability over the network without special privileges to achieve complete system compromise including data theft and integrity violations. …
Sign in for full analysis, threat intelligence, and remediation guidance.
Remediation
Within 24 hours: Identify and inventory all Firefox and Thunderbird installations across the organization using asset management tools; issue urgent communication to users advising against opening untrusted video content. Within 7 days: Disable hardware video acceleration in Firefox/Thunderbird via group policy or configuration management to reduce attack surface; prepare and stage browser version updates once patches are released. …
Sign in for detailed remediation steps.
Priority Score
Vendor Status
Share
External POC / Exploit Code
Leaving vuln.today