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Vulnerability record · CVE-2020-26535 · published 2 October 2020

CVE-2020-26535: Foxitsoftware foxit reader out-of-bounds write vulnerability

Foxitsoftware · Foxit Reader

An issue was discovered in Foxit Reader and PhantomPDF before 10.1. If TslAlloc attempts to allocate thread local storage but obtains an unacceptable index value, V8 throws an exception that leads to a write access violation (and read access violation).

9.8 CVSS 3.1 Critical EPSS 1.7% · top 23.5% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score, v2 7.5
1.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in Foxit Reader and PhantomPDF before 10.1. If TslAlloc attempts to allocate thread local storage but obtains an unacceptable index value, V8 throws an exception that leads to a write access violation (and read access violation).

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.foxitsoftware.com/support/security-bulletins.html PatchVendor Advisory
https://www.foxitsoftware.com/support/security-bulletins.html PatchVendor Advisory

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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-2020-26535), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.