CVE-2022-34221

Current-user code execution via type confusion

Published Jul 15, 2022 · Updated May 27, 2026

Type confusion in Adobe Acrobat Reader 22.001.20142 and earlier allows attackers to execute code as the current user through a malicious file. Adobe has not disclosed the affected parser or the incompatible resource types whose mistaken handling produces code execution. A victim must open the crafted file; successful exploitation runs attacker-controlled code with the victim's privileges on Windows or macOS.

CVSS severity7.8
High
EPSS probability11.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in Adobe Acrobat Reader 22.001.20142 and earlier allows attackers to execute code as the current user through a malicious file. Adobe has not disclosed the affected parser or the incompatible resource types whose mistaken handling produces code execution. A victim must open the crafted file; successful exploitation runs attacker-controlled code with the victim's privileges on Windows or macOS.

The record

CVE
CVE-2022-34221
Published
Jul 15, 2022
Updated
May 27, 2026
Vendor
Adobe
Product
Adobe Acrobat Reader
Classifications
CWE-843, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2022CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <=17.012.30229
  2. Affected versionversion=unspecified <=20.005.30334
  3. Affected versionversion=unspecified <=22.001.20142
  4. Affected versionversion=unspecified <=None

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Adobe · Adobe Acrobat Readerversion=unspecified <=17.012.30229; version=unspecified <=20.005.30334; version=unspecified <=22.001.20142; version=unspecified <=None

Published CVSS scores

7.8Adobe Systems IncorporatedCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
T1203Exploitation for Client Execution
T1204.002User Execution: Malicious File

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

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Your stack

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