What is CVE-2026-21719?

CVE-2026-21719 is a high-severity vulnerability in Cubecart, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-04-17.

How severe is CVE-2026-21719?

High severity. CVSS v3 base score is 7.2 out of 10.

RCE in Cubecart

CVE-2026-21719

An OS command injection vulnerability exists in CubeCart prior to 6.6.0, which may allow a user with an administrative privilege to execute an arbitrary OS command.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-04-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (67.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Cubecart
Cubecart Limited — versions prior to 6.6.0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

community.cubecart.com/t/cubecart-6-6-0-released-the-biggest-update-in-years/62… (Release Notes)
jvn.jp/en/jp/JVN78422311/ (Third Party Advisory)

Frequently asked questions

What is CVE-2026-21719?: CVE-2026-21719 is a high-severity vulnerability in Cubecart, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-04-17.
How severe is CVE-2026-21719?: High severity. CVSS v3 base score is 7.2 out of 10.