CVE-2021-31438

Remote code execution via PSP stack overflow

Published Apr 29, 2021 · Updated Aug 3, 2024

Stack-based buffer overflow in Foxit Studio Photo 3.6.6.931 allows remote attackers to execute arbitrary code via a crafted PSP file. The PSP parser copies attacker-controlled length data into a fixed-size stack buffer without validating bounds. Exploitation requires the victim 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

Stack-based buffer overflow in Foxit Studio Photo 3.6.6.931 allows remote attackers to execute arbitrary code via a crafted PSP file. The PSP parser copies attacker-controlled length data into a fixed-size stack buffer without validating bounds. Exploitation requires the victim to visit a malicious page or open a malicious file, and code runs in the current process context.

The record

CVE
CVE-2021-31438
Published
Apr 29, 2021
Updated
Aug 3, 2024
Vendor
Foxit Software
Product
Foxit Studio Photo
Classifications
CWE-121, T1203
Attack vector
local
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 vectorlocal
Required privilegesunauthenticated

What is affected?

Foxit Software · Foxit Studio Photoversion=3.6.6.931

Published CVSS scores

7.8Zero Day InitiativeCVSS:3.0/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-121Stack-based Buffer Overflow
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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