How severe is CVE-2018-3843?

CVE-2018-3843 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-3843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 24% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3843?

CVE-2018-3843 affects Foxitsoftware Foxit Reader. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-3843?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-3843 published?

CVE-2018-3843 was published on 2018-04-19 and last updated on 2026-06-17.

CVE-2018-3843

CVE-2018-3843 is a high-severity vulnerability in Foxitsoftware Foxit Reader with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 24% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-704.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 24% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-704
Affected product: Foxitsoftware Foxit Reader
Published: 2018-04-19
Last modified: 2026-06-17

Description

An exploitable type confusion vulnerability exists in the way Foxit PDF Reader version 9.0.1.1049 parses files with associated file annotations. A specially crafted PDF document can lead to an object of invalid type to be dereferenced, which can potentially lead to sensitive memory disclosure, and possibly to arbitrary code execution. An attacker needs to trick the user into opening the malicious file to trigger this vulnerability. If the browser plugin extension is enabled, visiting a malicious site can also trigger the vulnerability.

Frequently asked questions

What is CVE-2018-3843?: An exploitable type confusion vulnerability exists in the way Foxit PDF Reader version 9.0.1.1049 parses files with associated file annotations. A specially crafted PDF document can lead to an object of invalid type to be dereferenced, which can potentially lead to sensitive memory disclosure, and possibly to arbitrary code execution. An attacker needs to trick the user into opening the malicious file to trigger this vulnerability. If the browser plugin extension is enabled, visiting a malicious site can also trigger the vulnerability.
How severe is CVE-2018-3843?: CVE-2018-3843 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-3843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 24% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-3843?: CVE-2018-3843 affects Foxitsoftware Foxit Reader. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-3843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-3843 published?: CVE-2018-3843 was published on 2018-04-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:foxitsoftware:foxit_reader:9.0.1.1049:*:*:*:*:*:*:*

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