CVE-2020-3800Public exploitNetwork attack vector

Memory-address disclosure via xfa.loadXML use-after-free

Published Mar 25, 2020 · Updated Aug 4, 2024

Use-after-free in Adobe Acrobat and Reader 2015, 2017, and DC releases allows attackers to disclose memory addresses via malformed XFA XML. The AcroForm.api plug-in passes malformed XML from xfa.loadXML into its XFA parser, frees an object, and later dereferences that freed object. The trigger requires document JavaScript to invoke xfa.loadXML with malformed XML; the reported security consequence is limited to process-memory address disclosure.

CVSS severity7.5
High
EPSS probability2.87%
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 Adobe Acrobat and Reader 2015, 2017, and DC releases allows attackers to disclose memory addresses via malformed XFA XML. The AcroForm.api plug-in passes malformed XML from xfa.loadXML into its XFA parser, frees an object, and later dereferences that freed object. The trigger requires document JavaScript to invoke xfa.loadXML with malformed XML; the reported security consequence is limited to process-memory address disclosure.

The record

CVE
CVE-2020-3800
Published
Mar 25, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 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

5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

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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