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Vulnerability record · CVE-2026-91813 · published 23 September 2026

CVE-2026-91813: TOCTOU race condition vulnerability

A vulnerability in Foxit PDF Editor/Reader’s update mechanism allows an update package to be replaced between download and high-privilege extraction due to insufficient file locking and integrity validation. This could enable local attackers to execute arbitrary code with elevated privileges.

8.8 CVSS 3.1 High EPSS 0.09% · top 99.5% CWE-367 · TOCTOU race condition Awaiting Analysis
8.8CVSS 3.1 base score
0.09%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
23 Sep 2026Last modified by NVD

Description

A vulnerability in Foxit PDF Editor/Reader’s update mechanism allows an update package to be replaced between download and high-privilege extraction due to insufficient file locking and integrity validation. This could enable local attackers to execute arbitrary code with elevated privileges.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

LinkTags
https://www.foxit.com/support/security-bulletins.html

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-91813), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.