What is CVE-2021-36930?

CVE-2021-36930 is a medium-severity vulnerability in Microsoft Edge, classified under Improper Privilege Management. CVSS score: 5.3/10. Published 2021-09-02.

How severe is CVE-2021-36930?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Privilege escalation in Microsoft Edge

CVE-2021-36930

Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

Vulnerability class: Privilege Escalation

Published 2021-09-02 · last modified 2026-08-10.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.011 (63.9th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000

Affected products

Microsoft Edge
Microsoft Edge (Chromium-Based) — versions 1.0.0, 1.0.0.0

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36930 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2021-36930?: CVE-2021-36930 is a medium-severity vulnerability in Microsoft Edge, classified under Improper Privilege Management. CVSS score: 5.3/10. Published 2021-09-02.
How severe is CVE-2021-36930?: Medium severity. CVSS v3 base score is 5.3 out of 10.