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CVE-2021-31442

24
FAUCET Score

CVE-2021-31442 is a critical remote code execution vulnerability affecting Foxit Reader 10.1.1.37576 and PhantomPDF, stemming from improper validation of U3D objects in PDF files. This flaw allows an attacker to execute arbitrary code in the context of the current process, requiring user interaction such as opening a malicious file. With a CVSS score of 7.8 (High), it presents a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the potential for a write past the end of an allocated data structure (CWE-787) warrants attention.

Impacted Technologies

VendorProductVersion(s)CPE
<= 10.1.3.37598CPE matchmatch criteria
cpe:2.3:a:foxitsoftware:foxit_reader:*:*:*:*:*:*:*:*
<= 9.7.5.29616CPE matchmatch criteria
cpe:2.3:a:foxitsoftware:phantompdf:*:*:*:*:*:*:*:*
>= 10.0.0.0, <= 10.1.3.37598CPE matchmatch criteria
cpe:2.3:a:foxitsoftware:phantompdf:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.82%
Probability of exploitation in next 30 days
EPSS Percentile
85.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0282 is in the 85th percentile among its peer group of 11,621 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

foxitsoftware.com / support/security-bulletins.php
Vendor Advisory
zerodayinitiative.com / advisories/ZDI-21-531
Third Party AdvisoryVDB Entry