5.5

CVE-2026-96858: microsoft windows 10 version 21h2

CVSS: 5.5v3.1MediumUndergoing analysis
Published 13-10-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-96858 is a medium (CVSS 5.5) vulnerability in microsoft windows 10 version 21h2. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.5% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.35%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-10-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

Missing authentication for critical function in Windows Security Account Manager allows an authorized attacker to perform tampering locally.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

28%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

14-10-202621-10-2026
EPSS score
0.35%

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

Microsoft10 products

1 vendor · 10 products

References

1 links