What is CVE-2026-42902?

CVE-2026-42902 is a high-severity vulnerability in Microsoft Powertoys, classified under Improper Authorization. CVSS score: 7.8/10. Published 2026-06-09.

How severe is CVE-2026-42902?

High severity. CVSS v3 base score is 7.8 out of 10.

Auth bypass in Microsoft Powertoys

CVE-2026-42902

Improper authorization in Microsoft PowerToys allows an authorized attacker to elevate privileges locally.

Published 2026-06-09 · last modified 2026-07-23.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (20.4th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.4% 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: 0.003 · change: +0.000

Affected products

Microsoft Powertoys — versions 0.1
Microsoft Powertoys

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

Microsoft PowerToys Elevation of Privilege Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42902?: CVE-2026-42902 is a high-severity vulnerability in Microsoft Powertoys, classified under Improper Authorization. CVSS score: 7.8/10. Published 2026-06-09.
How severe is CVE-2026-42902?: High severity. CVSS v3 base score is 7.8 out of 10.