No exploitation reportedFix available

CVE-2021-45979

Q: Is CVE-2021-45979 actively exploited?

Active exploitation of CVE-2021-45979 has not been confirmed. Its EPSS score was 1.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-45979?

CVE-2021-45979 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2022-01-04
Fixed in11.1
WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Foxit PDF Reader and PDF Editor before 11.1 on macOS allow remote attackers to execute arbitrary code via app.launchURL in the JavaScript API.

Timeline

dates in UTC

2022-01-0415:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-45979?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-45979?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Foxit pdf editorversion to verify

Branch	Affected	Fixed in	Source
11.1	< 11.1	11.1	NVD

Foxit pdf readerversion to verify

Branch	Affected	Fixed in	Source
11.1	< 11.1	11.1	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Foxit pdf editor to 11.1

Advisories and patches

www.foxit.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.8read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
NVDweakness (CWE)CWE-78read 2026-10-23
FIRST EPSSEPSS score1.5 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2022-01-04
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-45979?

Foxit PDF Reader and PDF Editor before 11.1 on macOS allow remote attackers to execute arbitrary code via app.launchURL in the JavaScript API.

Is CVE-2021-45979 actively exploited?

Active exploitation of CVE-2021-45979 has not been confirmed. Its EPSS score was 1.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-45979?

CVE-2021-45979 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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