HOMEVULNERABILITIESCVE-2021-31454
HIGH

CVE-2021-31454

CWE-122Published: May 7, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 10.1.1.37576. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of the Decimal element. A crafted leadDigits value in a Decimal element can trigger an overflow of a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute arbitrary code in the context of the current process. Was ZDI-CAN-13095.

NVD Source

Technical Analysis

CVE-2021-31454 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

foxitsoftware2 product(s)
foxit readerphantompdf
Microsoft1 product(s)
windows
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.foxitsoftware.com/support/security-bulletins.php
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-21-543/
ADVISORYhttps://www.foxitsoftware.com/support/security-bulletins.php
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-21-543/

All References (4)

→
https://www.foxitsoftware.com/support/security-bulletins.phpVendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-21-543/Third Party Advisory · VDB Entry
→
https://www.foxitsoftware.com/support/security-bulletins.phpVendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-21-543/Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2021-31454
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-122
CISA KEVNo
Affected2 vendor(s)
PublishedMay 7, 2021

Related CVEs (CWE-122)

CVE-2022-34819
10.0
CVE-2025-23123
10.0
CVE-2021-25387
10.0
CVE-2021-21940
10.0
CVE-2026-46752
10.0
CVE-2026-44050
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-31454 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2021-31454·NVD