CVE-2021-42277

mediumpriority · track · 18EPSS 0.009 · 59 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.87% (59th) EPSS

CVSS 4.6 · medium

Is it mine?

123 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · msrc_csaf

EPSS · scored 2026-10-27

Diagnostics Hub Standard Collector Elevation of Privilege Vulnerability

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedMicrosoft Visual Studio 2015 Update 3msrc_csaf
27550.00:Security Update:https://support.microsoft.com/help/5007275
https://support.microsoft.com/help/5007275
FixedMicrosoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)msrc_csaf
15.9.41: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
16.11.6: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 16.7 (includes 16.0 – 16.6)msrc_csaf
16.7.21: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
16.9.13: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
FixedWindows 10 Version 1607 for 32-bit Systemsmsrc_csaf
10.0.14393.4770:Security Update:https://support.microsoft.com/help/5007192
https://support.microsoft.com/help/5007192
FixedWindows 10 Version 1607 for x64-based Systemsmsrc_csaf
10.0.14393.4770:Security Update:https://support.microsoft.com/help/5007192
https://support.microsoft.com/help/5007192
FixedWindows 10 Version 1809 for 32-bit Systemsmsrc_csaf
10.0.17763.2300:Security Update:https://support.microsoft.com/help/5007206
https://support.microsoft.com/help/5007206
FixedWindows 10 Version 1809 for ARM64-based Systemsmsrc_csaf
10.0.17763.2300:Security Update:https://support.microsoft.com/help/5007206
https://support.microsoft.com/help/5007206
FixedWindows 10 Version 1809 for x64-based Systemsmsrc_csaf
10.0.17763.2300:Security Update:https://support.microsoft.com/help/5007206
https://support.microsoft.com/help/5007206
FixedWindows 10 Version 1909 for 32-bit Systemsmsrc_csaf
10.0.18363.1916:Security Update:https://support.microsoft.com/help/5007189
https://support.microsoft.com/help/5007189
FixedWindows 10 Version 1909 for ARM64-based Systemsmsrc_csaf
10.0.18363.1916:Security Update:https://support.microsoft.com/help/5007189
https://support.microsoft.com/help/5007189
FixedWindows 10 Version 1909 for x64-based Systemsmsrc_csaf
10.0.18363.1916:Security Update:https://support.microsoft.com/help/5007189
https://support.microsoft.com/help/5007189
FixedWindows 10 Version 2004 for 32-bit Systemsmsrc_csaf
10.0.19041.1348:Security Update:https://support.microsoft.com/help/5007186
https://support.microsoft.com/help/5007186
FixedWindows 10 Version 2004 for ARM64-based Systemsmsrc_csaf
10.0.19041.1348:Security Update:https://support.microsoft.com/help/5007186
https://support.microsoft.com/help/5007186
FixedWindows 10 Version 2004 for x64-based Systemsmsrc_csaf
10.0.19041.1348:Security Update:https://support.microsoft.com/help/5007186
https://support.microsoft.com/help/5007186
FixedWindows 10 Version 20H2 for 32-bit Systemsmsrc_csaf
10.0.19042.1348:Security Update:https://support.microsoft.com/help/5007186
https://support.microsoft.com/help/5007186
FixedWindows 10 Version 20H2 for ARM64-based Systemsmsrc_csaf
10.0.19042.1348:Security Update:https://support.microsoft.com/help/5007186
https://support.microsoft.com/help/5007186
FixedWindows 10 Version 21H1 for 32-bit Systemsmsrc_csaf
10.0.19043.1348:Security Update:https://support.microsoft.com/help/5007186
https://support.microsoft.com/help/5007186
FixedWindows 10 Version 21H1 for ARM64-based Systemsmsrc_csaf
10.0.19043.1348:Security Update:https://support.microsoft.com/help/5007186
https://support.microsoft.com/help/5007186
FixedWindows 10 Version 21H1 for x64-based Systemsmsrc_csaf
10.0.19043.1348:Security Update:https://support.microsoft.com/help/5007186
https://support.microsoft.com/help/5007186
FixedWindows 10 for 32-bit Systemsmsrc_csaf
10.0.10240.19119:Security Update:https://support.microsoft.com/help/5007207
https://support.microsoft.com/help/5007207
FixedWindows 10 for x64-based Systemsmsrc_csaf
10.0.10240.19119:Security Update:https://support.microsoft.com/help/5007207
https://support.microsoft.com/help/5007207
FixedWindows 11 version 21H2 for ARM64-based Systemsmsrc_csaf
10.0.22000.318:Security Update:https://support.microsoft.com/help/5007215
https://support.microsoft.com/help/5007215
FixedWindows 11 version 21H2 for x64-based Systemsmsrc_csaf
10.0.22000.318:Security Update:https://support.microsoft.com/help/5007215
https://support.microsoft.com/help/5007215
FixedWindows Server 2016msrc_csaf
10.0.14393.4770:Security Update:https://support.microsoft.com/help/5007192
https://support.microsoft.com/help/5007192
FixedWindows Server 2016 (Server Core installation)msrc_csaf
10.0.14393.4770:Security Update:https://support.microsoft.com/help/5007192
https://support.microsoft.com/help/5007192
FixedWindows Server 2019msrc_csaf
10.0.17763.2300:Security Update:https://support.microsoft.com/help/5007206
https://support.microsoft.com/help/5007206
FixedWindows Server 2019 (Server Core installation)msrc_csaf
10.0.17763.2300:Security Update:https://support.microsoft.com/help/5007206
https://support.microsoft.com/help/5007206
FixedWindows Server 2022msrc_csaf
10.0.20348.350:Security Update:https://support.microsoft.com/help/5007205
https://support.microsoft.com/help/5007205
FixedWindows Server 2022 (Server Core installation)msrc_csaf
10.0.20348.350:Security Update:https://support.microsoft.com/help/5007205
https://support.microsoft.com/help/5007205
FixedWindows Server, version 2004 (Server Core installation)msrc_csaf
10.0.19041.1348:Security Update:https://support.microsoft.com/help/5007186
https://support.microsoft.com/help/5007186
FixedWindows Server, version 20H2 (Server Core Installation)msrc_csaf
10.0.19041.1348:Security Update:https://support.microsoft.com/help/5007186
https://support.microsoft.com/help/5007186

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.9–7.8

v2.04.6mediumAV:L/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 3.9 · impact 6.4

v2.03.9lowAV:L/AC:L/Au:N/C:P/I:P/A:P/E:Usecondary · CVSS-BT (t0sche)

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · secure@microsoft.com USexploitability 1.8 · impact 3.6

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · NVD / NIST USexploitability 1.8 · impact 5.9

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-269USprimaryCWE-269US

affected products (123)

Products and version ranges known to be affected.

Microsoft Microsoft Visual Studio 2015 Update 314.0.0 → 27550.00enisa_euvdEU
Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)15.9.0 → 15.9.41enisa_euvdEU
Microsoft Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10)16.11.0 → 16.11.6enisa_euvdEU
Microsoft Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)16.0.0 → 16.7.21enisa_euvdEU
Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)15.0.0 → 16.9.13enisa_euvdEU
Microsoft Windows 10 Version 150710.0.0 → 10.0.10240.19119enisa_euvdEU
Microsoft Windows 10 Version 160710.0.0 → 10.0.14393.4770enisa_euvdEU
Microsoft Windows 10 Version 180910.0.0 → 10.0.17763.2300enisa_euvdEU
Microsoft Windows 10 Version 190910.0.0 → 10.0.18363.1916enisa_euvdEU
Microsoft Windows 10 Version 200410.0.0 → 10.0.19041.1348enisa_euvdEU
Microsoft Windows 10 Version 20H210.0.0 → 10.0.19042.1348enisa_euvdEU
Microsoft Windows 10 Version 21H110.0.0 → 10.0.19043.1348enisa_euvdEU
Microsoft Windows 11 version 21H210.0.0 → 10.0.22000.318enisa_euvdEU
Microsoft Windows Server 201610.0.0 → 10.0.14393.4770enisa_euvdEU
Microsoft Windows Server 2016 (Server Core installation)10.0.0 → 10.0.14393.4770enisa_euvdEU
Microsoft Windows Server 201910.0.0 → 10.0.17763.2300enisa_euvdEU
Microsoft Windows Server 2019 (Server Core installation)10.0.0 → 10.0.17763.2300enisa_euvdEU
Microsoft Windows Server 202210.0.0 → 10.0.20348.350enisa_euvdEU
Microsoft Windows Server version 200410.0.0 → 10.0.19041.1348enisa_euvdEU
Microsoft Windows Server version 20H210.0.0 → 10.0.19041.1348enisa_euvdEU

showing 20 of 123

advisories (1)

Vendor and ecosystem advisories describing this.

msrc_CVE-2021-42277Diagnostics Hub Standard Collector Elevation of Privilege Vulnerability2021-11-09csaf · 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.

cnnvd enisa_euvd fstec_bdu msrc_csaf NVD CVE.org MITRE

published 2021-11-10modified 2026-08-19

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references (10)

External citations — patches, advisories, analysis.

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