CVE-2021-26434
highpriority · track · 29EPSS 0.009 · 59 %ileEURUUSEPSS · scored 2026-10-27
Visual Studio Elevation of Privilege Vulnerability
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedMicrosoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)msrc_csaf
15.9.39:Security Update:https://docs.microsoft.com/en-us/visualstudio/releasenotes/vs2017-relnotes
https://docs.microsoft.com/en-us/visualstudio/releasenotes/vs2017-relnotes - FixedMicrosoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10)msrc_csaf
16.11.3:Security Update:https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes-v16.11
https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes-v16.11 - FixedMicrosoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)msrc_csaf
16.4.26:Security Update:https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes-v16.4
https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes-v16.4 - FixedMicrosoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)msrc_csaf
16.7.19:Security Update:https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes-v16.7
https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes-v16.7 - FixedMicrosoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)msrc_csaf
16.9.11:Security Update:https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes-v16.9
https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes-v16.9
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–7.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (21)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- msrc_CVE-2021-26434Visual Studio Elevation of Privilege Vulnerability2021-09-14csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26434cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-26434cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26434cnnvd
- https://vigilance.fr/vulnerability/Microsoft-Visual-Studio-vulnerabilities-of-September-2021-36412cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021091446cnnvd
- https://www.zerodayinitiative.com/advisories/ZDI-21-1077/cnnvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26434enisa_euvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26434nvd
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