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CVE-2026-24285: microsoft 365_copilot Use After Free

CVSS: 7.0v3.1HighAnalyzed
Published 10-03-2026Last modified 19-06-2026
Open JSON

Vulnerability summary

CVE-2026-24285 is a high (CVSS 7.0) Use After Free vulnerability in microsoft 365_copilot. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.4% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.0/10
010
High · v3.1 (CVE.org)
EPSS score
0.47%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 10-03-2026
    PublishedVulnerability first disclosed.
  2. 19-06-2026
    Last modifiedVulnerability information updated.

Description

Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

+0.01 pp

From 0.46% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.47%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft30 products

1 vendor · 30 products

References

1 links