SECUFOCUSNOW
Home›CVE index›CVE-2021-26434
ReviewHigh

CVE-2021-26434

Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)

CVE-2021-26434 affects Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3). Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

CVSS
7.8
EPSS
0.88%
56.8% percentile
CISA KEV
Not listed
Published
2021.09.15
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.88%
Technical severityCVSS 7.8

Vulnerability overview

CVE-2021-26434 affects Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3). Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

Affected product and versions

Product
Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)
Affected versions
>= 15.9.0 < 15.9.39, >= 16.11.0 < 16.11.3, >= 16.0 < 16.4.26, >= 16.0.0 < 16.7.19, >= 15.0.0 < 16.9.11, >= 15.0 <= 15.9, >= 16.0 <= 16.11
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3) and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-732