CVE-2018-18933

CVE-2018-18933 is a critical-severity vulnerability in Foxitsoftware Foxit Reader with a CVSS 3.x base score of 9.1. 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-125.

Key facts

• Severity: Critical (CVSS 3.x base score 9.1)
• CVSS v2: 6.4
• EPSS exploit prediction: 3% (86th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-125
• Affected product: Foxitsoftware Foxit Reader
• Published: 2018-11-05
• Last modified: 2026-06-17

Description

The u3d plugin 9.3.0.10809 (aka plugins\U3DBrowser.fpi) in FoxitReader.exe in Foxit Reader 9.3.0.10826 allows remote attackers to cause a denial of service (out-of-bounds read) or obtain sensitive information via a U3D sample because of a "Read Access Violation near NULL starting at FoxitReader!safe_vsnprintf+0x00000000002c4330" issue.

Frequently asked questions

What is CVE-2018-18933?

The u3d plugin 9.3.0.10809 (aka plugins\U3DBrowser.fpi) in FoxitReader.exe in Foxit Reader 9.3.0.10826 allows remote attackers to cause a denial of service (out-of-bounds read) or obtain sensitive information via a U3D sample because of a "Read Access Violation near NULL starting at FoxitReader!safe_vsnprintf+0x00000000002c4330" issue.

How severe is CVE-2018-18933?

CVE-2018-18933 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2018-18933 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18933?

CVE-2018-18933 primarily affects Foxitsoftware Foxit Reader. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-18933?

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

When was CVE-2018-18933 published?

CVE-2018-18933 was published on 2018-11-05 and last updated on 2026-06-17.

References

• https://github.com/Yan-1-20/Yan-1-20.github.io/blob/master/2018/11/02/2018/11/2018-11-02/index.html
• https://github.com/Yan-1-20/Yan-1-20.github.io/blob/master/2018/11/10/2018/11/2018-11-10/index.html
• https://yan-1-20.github.io/2018/11/02/2018/11/2018-11-02/
• https://yan-1-20.github.io/2018/11/10/2018/11/2018-11-10/
• https://www.foxitsoftware.com/support/security-bulletins.php

Affected products (2)

• cpe:2.3:a:foxitsoftware:foxit_reader:9.3.0.10826:*:*:*:*:*:*:*
• cpe:2.3:a:foxitsoftware:u3d:9.3.0.10809:*:*:*:*:*:*:*

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Other CWE-125 (Out-of-bounds Read) vulnerabilities

• CVE-2026-24826 — Critical (CVSS 10.0): Out-of-bounds Write, Divide By Zero, NULL Pointer Dereference, Use of Uninitialized Resource, Out-of-bounds Read,…
• CVE-2024-22004 — Critical (CVSS 10.0): Due to length check, an attacker with privilege access on a Linux Nonsecure operating system can trigger a…
• CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
• CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
• CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
• CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

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