What is CVE-2023-36657?

CVE-2023-36657 is a critical-severity vulnerability in Opswat Metadefender Kiosk, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2023-09-15.

How severe is CVE-2023-36657?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Privilege escalation in Opswat Metadefender Kiosk

CVE-2023-36657

An issue was discovered in OPSWAT MetaDefender KIOSK 4.6.1.9996. Built-in features of Windows (desktop shortcuts, narrator) can be abused for privilege escalation.

Vulnerability class: Privilege Escalation

Published 2023-09-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (50.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.001

Affected products

Opswat Metadefender Kiosk

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

docs.opswat.com/mdkiosk (Product, Release Notes)
docs.opswat.com/mdkiosk/release-notes/cve-2023-36657 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2023-36657?: CVE-2023-36657 is a critical-severity vulnerability in Opswat Metadefender Kiosk, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2023-09-15.
How severe is CVE-2023-36657?: Critical severity. CVSS v3 base score is 9.8 out of 10.