7.5

CVE-2021-26423: microsoft microsoft visual studio 2017 version 15.9 (includes 15.0 - 15.8)

CVSS: 7.5v3.1HighModified
AliasesGHSA-rh58-r7jh-xhx3BIT-dotnet-2021-26423BIT-dotnet-sdk-2021-26423
Published 12-08-2021Last modified 10-08-2026
Open JSON

Vulnerability summary

CVE-2021-26423 is a high (CVSS 7.5) vulnerability in microsoft microsoft visual studio 2017 version 15.9 (includes 15.0 - 15.8). EPSS estimates a 3.90% chance of exploitation in the next 30 days, higher than 90.1% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
3.90%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4
RHSA-2021:3142RHSA-2021:3143RHSA-2021:3147RHSA-2021:3148

Timeline

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

Description

.NET Core and Visual Studio Denial of Service Vulnerability

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

3.90%

Chance of exploitation in the next 30 days

Percentile

90%

Versus all other CVEs

30-day change

0.00 pp

From 3.90% on 19-09-2026

19-09-202619-10-2026
EPSS score
3.90%

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

NuGet23 products
  • Microsoft.NETCore.App.Runtime.linux-arm≥ 3.1.0, < 3.1.18 | ≥ 5.0.0, < 5.0.9
  • Microsoft.NETCore.App.Runtime.linux-arm64≥ 3.1.0, < 3.1.18 | ≥ 5.0.0, < 5.0.9
  • Microsoft.NETCore.App.Runtime.linux-musl-arm≥ 5.0.0, < 5.0.9
  • Microsoft.NETCore.App.Runtime.linux-musl-arm64≥ 3.1.0, < 3.1.18 | ≥ 5.0.0, < 5.0.9
  • Microsoft.NETCore.App.Runtime.linux-musl-x64≥ 3.1.0, < 3.1.18 | ≥ 5.0.0, < 5.0.9
Microsoft16 products

2 vendors · 39 products

References

5 links