Is CVE-2026-2447 actively exploited?

No active exploitation of CVE-2026-2447 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-2447 be exploited remotely?

Yes. CVE-2026-2447 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-2447?

CVE-2026-2447 has a CVSS score of 8.8 (HIGH) and an EPSS exploitation probability of 0.04%.

HOME VULNERABILITIESCVE-2026-2447

HIGH

CVE-2026-2447

CWE-122Published: February 16, 2026· Updated: Feb 22, 2026

8.8

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.0th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-2447 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.