CVE-2020-27860

Code execution via invalid XFA layout-object conversion

Published Feb 11, 2021 · Updated Aug 4, 2024

Out-of-bounds write in XFA parsing in Foxit PDF Reader 10.1.0.37527 and earlier allows remote attackers to execute code. While modifying control attributes and appending nodes, the parser fails to validate an object and converts it from an incorrect layout object, writing past an allocated structure. Exploitation requires a user to visit a malicious page or open a malicious PDF, and successful code runs in the current process context.

CVSS severity7.8
High
EPSS probability3.55%
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 XFA parsing in Foxit PDF Reader 10.1.0.37527 and earlier allows remote attackers to execute code. While modifying control attributes and appending nodes, the parser fails to validate an object and converts it from an incorrect layout object, writing past an allocated structure. Exploitation requires a user to visit a malicious page or open a malicious PDF, and successful code runs in the current process context.

The record

CVE
CVE-2020-27860
Published
Feb 11, 2021
Updated
Aug 4, 2024
Vendor
Foxit Software
Product
Foxit PDF Reader
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2021CVE 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=10.0.1.35811

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Foxit Software · Foxit PDF Readerversion=10.0.1.35811

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS: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.

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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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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