CVE-2020-9594Public exploit

Arbitrary code execution via PDF JavaScript heap overwrite

Published Jun 25, 2020 · Updated Aug 4, 2024

Out-of-bounds write in Adobe Acrobat and Reader 2020.006.20042 and earlier allows attackers to execute code through a crafted PDF. A PDF JavaScript sequence creates a button field, assigns extreme border and zoom values, and invokes scrolling, causing a heap write beyond bounds; the closed-source root cause is undisclosed. User interaction is required to open the document, and the code runs as the current user; 2017.011.30166 and earlier and 2015.006.30518 and earlier are also affected.

CVSS severity7.8
High
EPSS probability3.50%
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 and Reader 2020.006.20042 and earlier allows attackers to execute code through a crafted PDF. A PDF JavaScript sequence creates a button field, assigns extreme border and zoom values, and invokes scrolling, causing a heap write beyond bounds; the closed-source root cause is undisclosed. User interaction is required to open the document, and the code runs as the current user; 2017.011.30166 and earlier and 2015.006.30518 and earlier are also affected.

The record

CVE
CVE-2020-9594
Published
Jun 25, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 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 vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

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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