8.8

CVE-2021-34535: microsoft remote_desktop_client

CVSS: 8.8v3.1HighModified
Published 12-08-2021Last modified 10-08-2026
Open JSON

Vulnerability summary

CVE-2021-34535 is a high (CVSS 8.8) vulnerability in microsoft remote_desktop_client. EPSS estimates a 21.86% chance of exploitation in the next 30 days, higher than 97.6% of scored vulnerabilities.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
21.86%
0%100%
High · +0.17 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 12-08-2021
    PublishedVulnerability first disclosed.
  2. 10-08-2026
    Last modifiedVulnerability information updated.

Description

Remote Desktop Client Remote Code Execution Vulnerability

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

21.86%

Chance of exploitation in the next 30 days

Percentile

98%

Versus all other CVEs

30-day change

+0.17 pp

From 21.69% on 20-09-2026

20-09-202620-10-2026
EPSS score
21.86%

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

Microsoft20 products

1 vendor · 20 products

References

2 links