CVE-2021-34524

mediumpriority · track · 27EPSS 0.036 · 89 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.62% (89th) EPSS

CVSS 6.5 · medium

Is it mine?

10 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · msrc_csaf

EPSS · scored 2026-10-27

Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability

remediations

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

A vendor fix is available.

FixedMicrosoft Dynamics 365 (on-premises) version 9.0msrc_csaf
9.0.31.7:Security Update:https://support.microsoft.com/en-us/topic/service-update-0-31-for-microsoft-dynamics-crm-on-premises-9-0-5bb7ff5b-8fbd-465c-8590-6e4522289913
https://support.microsoft.com/en-us/topic/service-update-0-31-for-microsoft-dynamics-crm-on-premises-9-0-5bb7ff5b-8fbd-465c-8590-6e4522289913
FixedMicrosoft Dynamics 365 (on-premises) version 9.1msrc_csaf
9.1.3.11:Security Update:https://support.microsoft.com/en-us/topic/service-update-1-3-for-microsoft-dynamics-crm-on-premises-9-1-4f9cb846-6c00-4fc1-9c13-bc0bbe733009
https://support.microsoft.com/en-us/topic/service-update-1-3-for-microsoft-dynamics-crm-on-premises-9-1-4f9cb846-6c00-4fc1-9c13-bc0bbe733009

cvss

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

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.5–8.8

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4

v2.05.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:P/E:Usecondary · CVSS-BT (t0sche)

v3.18.8highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · secure@microsoft.com USexploitability 2.8 · impact 5.2

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:Csecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · NVD / NIST USexploitability 2.8 · impact 5.9

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-94US

affected products (10)

Products and version ranges known to be affected.

Microsoft Microsoft Dynamics 365 (on-premises) version 9.09.0.0 → 9.0.31.7enisa_euvdEU
Microsoft Microsoft Dynamics 365 (on-premises) version 9.19.0 → 9.1.3.11enisa_euvdEU
Microsoft Corp Microsoft Dynamics 365 (on-premises)≤ 9.1fstec_bduRU
Microsoft Corp Microsoft Dynamics 365 (on-premises)≤ 9.0fstec_bduRU
Microsoft Dynamics 365 (on-premises) version 9.0all versionsfixedmsrc_csafUS
Microsoft Dynamics 365 (on-premises) version 9.0< 9.0.31.7msrc_csafUS
Microsoft Dynamics 365 (on-premises) version 9.1all versionsfixedmsrc_csafUS
Microsoft Dynamics 365 (on-premises) version 9.1< 9.1.3.11msrc_csafUS
microsoft dynamics 365= 9.0nvdUScpe:2.3:a:microsoft:dynamics_365:*:*:*:*:*:*:*:*
microsoft dynamics 365= 9.1nvdUScpe:2.3:a:microsoft:dynamics_365:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

msrc_CVE-2021-34524Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability2021-08-10csaf · 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 NVD CVE.org MITRE

published 2021-08-12modified 2026-08-10

references (7)

External citations — patches, advisories, analysis.

scry

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