5.5

CVE-2021-26869: microsoft windows_10

CVSS: 5.5v3.1MediumModified
Published 11-03-2021Last modified 19-08-2026
Open JSON

Vulnerability summary

CVE-2021-26869 is a medium (CVSS 5.5) vulnerability in microsoft windows_10. EPSS estimates a 1.03% chance of exploitation in the next 30 days, higher than 63.3% 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
1.03%
0%100%
Low · +0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 11-03-2021
    PublishedVulnerability first disclosed.
  2. 19-08-2026
    Last modifiedVulnerability information updated.

Description

Windows ActiveX Installer Service Information Disclosure Vulnerability

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.03%

Chance of exploitation in the next 30 days

Percentile

63%

Versus all other CVEs

30-day change

+0.07 pp

From 0.96% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.03%

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

No weakness data has been published for this record.

Affected systems

Microsoft26 products

1 vendor · 26 products

References

2 links