CVE-2020-3749Network attack vector

Arbitrary code execution via use-after-free

Published Feb 13, 2020 · Updated Aug 4, 2024

Use-after-free in affected Adobe Acrobat and Reader releases allows attackers to execute arbitrary code via unspecified vectors. Adobe identifies the flaw only as use-after-free and does not disclose the affected parser, object-lifetime error, or input format. Affected versions are 2019.021.20061 and earlier, 2017.011.30156 and earlier, and 2015.006.30508 and earlier; code runs with the current user's privileges.

CVSS severity9.8
Critical
EPSS probability4.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in affected Adobe Acrobat and Reader releases allows attackers to execute arbitrary code via unspecified vectors. Adobe identifies the flaw only as use-after-free and does not disclose the affected parser, object-lifetime error, or input format. Affected versions are 2019.021.20061 and earlier, 2017.011.30156 and earlier, and 2015.006.30508 and earlier; code runs with the current user's privileges.

The record

CVE
CVE-2020-3749
Published
Feb 13, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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

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Your stack

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