CVE-2022-34217

Code execution via embedded-font buffer overwrite

Published Jul 15, 2022 · Updated Apr 23, 2025

Out-of-bounds write in Adobe Acrobat Reader allows remote attackers to execute code through crafted data in an embedded font. The embedded-font parser trusts crafted font data and writes past the end of an allocated buffer. A victim must open a malicious file; exploitation runs code in the current process under the victim's account, and affected release bounds differ between Windows and macOS Classic tracks.

CVSS severity7.8
High
EPSS probability3.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Adobe Acrobat Reader allows remote attackers to execute code through crafted data in an embedded font. The embedded-font parser trusts crafted font data and writes past the end of an allocated buffer. A victim must open a malicious file; exploitation runs code in the current process under the victim's account, and affected release bounds differ between Windows and macOS Classic tracks.

The record

CVE
CVE-2022-34217
Published
Jul 15, 2022
Updated
Apr 23, 2025
Vendor
Adobe
Product
Adobe Acrobat Reader
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record 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

7.8AdobeCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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