What is CVE-2023-28261?

CVE-2023-28261 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under Improper Privilege Management. CVSS score: 5.7/10. Published 2023-04-27.

How severe is CVE-2023-28261?

Medium severity. CVSS v3 base score is 5.7 out of 10.

Is CVE-2023-28261 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Privilege escalation in Microsoft Edge Chromium

CVE-2023-28261

Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

Vulnerability class: Privilege Escalation

Published 2023-04-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.8% 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: 0.006 · change: 0.000

Affected products

Microsoft Edge Chromium
Microsoft Edge (Chromium-Based) — versions 1.0.0
Microsoft Edge (Chromium-Based) Extended Stable — versions 1.0.0

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

Public proof-of-concept exploits

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-28261 (vendor-advisory, Patch, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)

Frequently asked questions

What is CVE-2023-28261?: CVE-2023-28261 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under Improper Privilege Management. CVSS score: 5.7/10. Published 2023-04-27.
How severe is CVE-2023-28261?: Medium severity. CVSS v3 base score is 5.7 out of 10.
Is CVE-2023-28261 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.