How severe is CVE-2026-5939?

CVE-2026-5939 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-5939 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5939?

CVE-2026-5939 primarily affects Foxit Pdf Editor. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-5939?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-5939 have an EU (EUVD) identifier?

Yes. CVE-2026-5939 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25825.

When was CVE-2026-5939 published?

CVE-2026-5939 was published on 2026-04-27 and last updated on 2026-06-17.

CVE-2026-5939

CVE-2026-5939 is a medium-severity vulnerability in Foxit Pdf Editor with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25825
Weakness: CWE-416
Affected product: Foxit Pdf Editor
Published: 2026-04-27
Last modified: 2026-06-17

Description

A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the application to crash and resulting in an arbitrary code execution.

Frequently asked questions

What is CVE-2026-5939?: A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the application to crash and resulting in an arbitrary code execution.
How severe is CVE-2026-5939?: CVE-2026-5939 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-5939 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5939?: CVE-2026-5939 primarily affects Foxit Pdf Editor. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-5939?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5939 have an EU (EUVD) identifier?: Yes. CVE-2026-5939 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25825.
When was CVE-2026-5939 published?: CVE-2026-5939 was published on 2026-04-27 and last updated on 2026-06-17.

References

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

Affected products (2)

cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*
cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:*

More vulnerabilities in Foxit Pdf Editor

CVE-2022-28104 — Critical (CVSS 9.8): Foxit PDF Editor v11.3.1 was discovered to contain an arbitrary file upload vulnerability.
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CVE-2022-24954 — Critical (CVSS 9.8): Foxit PDF Reader before 11.2.1 and Foxit PDF Editor before 11.2.1 have a Stack-Based Buffer Overflow related to XFA,…
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Other CWE-416 (Use After Free) vulnerabilities

CVE-2026-13782 — Critical (CVSS 10.0): Use after free in Browser in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the…
CVE-2026-4725 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149…
CVE-2026-4688 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox…
CVE-2025-24085 — Critical (CVSS 10.0): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.3 and iPadOS 18.3,…
CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
CVE-2021-32495 — Critical (CVSS 10.0): Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory…

Browse all CWE-416 (Use After Free) vulnerabilities →