CVE-2021-44710

User-context code execution via Format event use-after-free

Published Jan 14, 2022 · Updated Sep 16, 2024

Use-after-free in Adobe Acrobat Reader allows attackers to execute code in the current user's context via a malicious PDF. Format event action processing accesses an object after its memory has been freed; Adobe has not disclosed the affected function or lifetime transition. Exploitation requires the victim to open the crafted file, and successful code runs with that victim's existing privileges.

CVSS severity7.8
High
EPSS probability11.61%
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

Use-after-free in Adobe Acrobat Reader allows attackers to execute code in the current user's context via a malicious PDF. Format event action processing accesses an object after its memory has been freed; Adobe has not disclosed the affected function or lifetime transition. Exploitation requires the victim to open the crafted file, and successful code runs with that victim's existing privileges.

The record

CVE
CVE-2021-44710
Published
Jan 14, 2022
Updated
Sep 16, 2024
Vendor
Adobe
Product
Adobe Acrobat Reader
Classifications
CWE-416, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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=unspecified <=17.011.30204
  2. Affected versionversion=unspecified <=20.004.30017
  3. Affected versionversion=unspecified <=21.007.20099
  4. Affected versionversion=unspecified <=None

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Adobe · Adobe Acrobat Readerversion=unspecified <=17.011.30204; version=unspecified <=20.004.30017; version=unspecified <=21.007.20099; 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 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-416Use After Free
T1204.002User Execution: Malicious File
T1203Exploitation for Client Execution

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