What is CVE-2021-27195?

CVE-2021-27195 is a medium-severity vulnerability in Microsoft Windows, classified under Incorrect Authorization. CVSS score: 5.9/10. Published 2021-03-25.

How severe is CVE-2021-27195?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Auth bypass in Microsoft Windows

CVE-2021-27195

Improper Authorization vulnerability in Netop Vision Pro up to and including to 9.7.1 allows an attacker to replay network traffic.

Vulnerability class: Broken Access Control

Published 2021-03-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.008 (53.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

www.mcafee.com/blogs/other-blogs/mcafee-labs/netop-vision-pro-distance-learning… (Third Party Advisory)

Frequently asked questions

What is CVE-2021-27195?: CVE-2021-27195 is a medium-severity vulnerability in Microsoft Windows, classified under Incorrect Authorization. CVSS score: 5.9/10. Published 2021-03-25.
How severe is CVE-2021-27195?: Medium severity. CVSS v3 base score is 5.9 out of 10.