CVE-2020-3791Network attack vector

Information disclosure via Type 1 font parsing

Published Mar 25, 2020 · Updated Aug 4, 2024

Out-of-bounds read in Adobe Photoshop CC 2019 through 20.0.8 and Photoshop 2020 through 21.1 allows remote attackers to disclose memory. The Type 1 font parser fails to validate user-supplied charstring data before reading past the end of an allocated buffer. Exploitation requires opening a malicious file or visiting a malicious page, and the disclosure can assist a chained code-execution attack.

CVSS severity4.3
Medium
EPSS probability2.16%
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 read in Adobe Photoshop CC 2019 through 20.0.8 and Photoshop 2020 through 21.1 allows remote attackers to disclose memory. The Type 1 font parser fails to validate user-supplied charstring data before reading past the end of an allocated buffer. Exploitation requires opening a malicious file or visiting a malicious page, and the disclosure can assist a chained code-execution attack.

The record

CVE
CVE-2020-3791
Published
Mar 25, 2020
Updated
Aug 4, 2024
Vendor
Adobe
Product
Adobe Photoshop
Classifications
CWE-125, T1204.002
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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Photoshop CC 2019, and Photoshop 2020 versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Adobe · Adobe Photoshopversion=Photoshop CC 2019, and Photoshop 2020 versions

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/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.

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-125Out-of-bounds Read
T1204.002Malicious 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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