What is CVE-2026-7491?

CVE-2026-7491 is a high-severity vulnerability in Zyosoft School App, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-05-02.

How severe is CVE-2026-7491?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Zyosoft School App

CVE-2026-7491

School App developed by Zyosoft has an Insecure Direct Object Reference vulnerability, allowing authenticated remote attackers to modify a specific parameter to read and modify other users' data.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-05-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (36.3th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.002

Affected products

Zyosoft School App — versions 0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

www.twcert.org.tw/tw/cp-132-10896-e3240-1.html (third-party-advisory)
www.twcert.org.tw/en/cp-139-10897-64257-2.html (third-party-advisory)

Frequently asked questions

What is CVE-2026-7491?: CVE-2026-7491 is a high-severity vulnerability in Zyosoft School App, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-05-02.
How severe is CVE-2026-7491?: High severity. CVSS v3 base score is 8.1 out of 10.