9.3

CVE-2020-1113: microsoft windows_10 Improper Certificate Validation

CVSS: 9.3v2.0HighModified
Published 21-05-2020Last modified 19-08-2026
Open JSON

Vulnerability summary

CVE-2020-1113 is a high (CVSS 9.3) Improper Certificate Validation vulnerability in microsoft windows_10. EPSS estimates a 6.31% chance of exploitation in the next 30 days, higher than 93.5% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.3/10
010
High · v2.0 (NVD)
EPSS score
6.31%
0%100%
Low · +0.20 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-05-2020
    PublishedVulnerability first disclosed.
  2. 19-08-2026
    Last modifiedVulnerability information updated.

Description

A security feature bypass vulnerability exists in Microsoft Windows when the Task Scheduler service fails to properly verify client connections over RPC. An attacker who successfully exploited this vulnerability could run arbitrary code as an administrator. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, a man-in-the-middle attacker would need to send a specially crafted request to a vulnerable system. The security update addresses the vulnerability by correcting how the Task Scheduler service validates connections.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

6.31%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

+0.20 pp

From 6.11% on 21-09-2026

21-09-202621-10-2026
EPSS score
6.31%

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

Microsoft31 products

1 vendor · 31 products

References

2 links