CVE-2021-31437Network attack vector

Arbitrary code execution via JP2 parsing

Published Apr 29, 2021 · Updated Aug 3, 2024

Out-of-bounds write in Foxit Studio Photo 3.6.6.931 allows remote attackers to execute arbitrary code via malicious JP2 files. The JP2 parser writes past an allocated structure boundary because supplied data is not properly validated. Exploitation requires a user to visit a malicious page or open a malicious file, and code runs in the current process context.

CVSS severity7.8
High
EPSS probability2.76%
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 Foxit Studio Photo 3.6.6.931 allows remote attackers to execute arbitrary code via malicious JP2 files. The JP2 parser writes past an allocated structure boundary because supplied data is not properly validated. Exploitation requires a user to visit a malicious page or open a malicious file, and code runs in the current process context.

The record

CVE
CVE-2021-31437
Published
Apr 29, 2021
Updated
Aug 3, 2024
Vendor
Foxit Software
Product
Foxit Studio Photo
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=3.6.6.931

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Foxit Software · Foxit Studio Photoversion=3.6.6.931

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
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.

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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