CVE-2021-36938

Local information disclosure

Published Aug 12, 2021 · Updated Aug 10, 2026

Information disclosure in the Windows Cryptographic Primitives Library allows local users with low privileges to obtain unspecified information. Microsoft has not published the affected function, the exposed data, or the incorrect operation within the library. Exploitation requires local low-privilege access, and the reported impact is limited to confidentiality without integrity or availability loss.

CVSS severity5.5
Medium
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in the Windows Cryptographic Primitives Library allows local users with low privileges to obtain unspecified information. Microsoft has not published the affected function, the exposed data, or the incorrect operation within the library. Exploitation requires local low-privilege access, and the reported impact is limited to confidentiality without integrity or availability loss.

The record

CVE
CVE-2021-36938
Published
Aug 12, 2021
Updated
Aug 10, 2026
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.10240.0 <10.0.10240.19022

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.19022
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.2114
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.4583
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.4583
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.2114
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.4583
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.2114; version=10.0.17763.0 <10.0.17763.2114

Published CVSS scores

5.5Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo