7.8

CVE-2026-91811: foxit software inc. foxit pdf editor Out-of-bounds Write

CVSS: 7.8v3.1HighAnalyzed
Published 23-09-2026Last modified 23-09-2026
Open JSON

Vulnerability summary

CVE-2026-91811 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in foxit software inc. foxit pdf editor. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.5% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.12%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 23-09-2026
    PublishedVulnerability first disclosed.
  2. 23-09-2026
    Last modifiedVulnerability information updated.

Description

A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader’s PRC parser due to insufficient validation of vertex indices in triangular fan texture meshes. Successful exploitation could result in memory corruption and an application crash.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

23-09-202620-10-2026
EPSS score
0.12%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Foxit2 products
  • pdf_editor≤ 13.2.5.63482 | ≥ 14.0.0.33046, ≤ 14.0.7.33751 | ≥ 2023.1.0.15510, ≤ 2023.3.0.23028 | ≥ 2024.1.0.23997, ≤ 2024.4.1.27687 | ≥ 2025.1.0.27937, ≤ 2025.3.0.35737 | ≥ 2026.1.0.36452, ≤ 2026.2.0.39747 | ≤ 13.2.2.63349 | ≥ 14.0.0.68868, ≤ 14.0.7.69441 | ≥ 2023.1.0.55583, ≤ 2023.3.0.63083 | ≥ 2024.1.0.63682, ≤ 2024.4.1.66479 | ≥ 2025.1.0.66692, ≤ 2025.3.0.69570 | ≥ 2026.1.0.70169, ≤ 2026.2.0.72029
  • pdf_reader≤ 2026.2.0.39747 | ≤ 2026.2.1.39815
Foxit software inc.2 products

2 vendors · 4 products

References

1 links