CVE-2022-34709Public exploit

Privilege escalation via ASN.1 decoder type confusion

Published Aug 9, 2022 · Updated May 29, 2025

Type confusion in Microsoft Windows Defender Credential Guard allows local users to elevate privileges through its ASN.1 decoder. The decoder interprets a crafted ASN.1 object as an incompatible type, enabling execution paths that bypass Credential Guard protections. Exploitation requires local administrator privileges and can compromise protected credential confidentiality and integrity without interrupting service.

CVSS severity6.0
Medium
EPSS probability1.19%
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

Type confusion in Microsoft Windows Defender Credential Guard allows local users to elevate privileges through its ASN.1 decoder. The decoder interprets a crafted ASN.1 object as an incompatible type, enabling execution paths that bypass Credential Guard protections. Exploitation requires local administrator privileges and can compromise protected credential confidentiality and integrity without interrupting service.

The record

CVE
CVE-2022-34709
Published
Aug 9, 2022
Updated
May 29, 2025
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-843, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 9, 2022CVE publishedPublication date reported by the CVE source.
  2. May 29, 2025Record 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 <10.0.10240.19387

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.19387
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.3287
Microsoft · Windows 10 Version 21H1version=10.0.0 <10.0.19043.1889
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.5291
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.856
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.1889
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.5291
Microsoft · Windows 10 Version 20H2version=10.0.0 <10.0.19042.1889
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.3287
Microsoft · Windows Server version 20H2version=10.0.0 <10.0.19042.1889
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.5291
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.887
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.3287; version=10.0.17763.0 <10.0.17763.3287

Published CVSS scores

6.0Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
T1068Exploitation for Privilege Escalation

Public exploit references

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