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    CVE-2021-21822

    A use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader, version 10.1.3.37598. A specially crafted PDF document can trigger the reuse of previously free memory, which can lead to arbitrary code execution. An attacker needs to trick the user into opening a malicious file or site to trigger this vulnerability if the browser plugin extension is enabled.

    Published:May 10, 2021
    Last Modified:Nov 21, 2024
    EPS:May 10, 2021
    EPSS Score:0.198
    CVSS Score:8.8

    Affected Products

    Vendor
    Foxitsoftware
    Product
    Foxit Reader

    Exploits

    https://talosintelligence.com/vulnerability_reports/TALOS-2021-1287https://talosintelligence.com/vulnerability_reports/TALOS-2021-1287

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-18622 (CVSS 4.7) — Foxit PDF Editor/Reader inconsistently alerts users when signature fields are abnormally modified, including a…
    CVE-2026-13126 (CVSS 7.8) — The embedded JavaScript in the PDF deleted the pages, making the object invalid. The application attempted to …
    CVE-2026-13127 (CVSS 7.8) — The application opens the PDF file. JavaScript then rewrites the document to modify the page structure, result…
    CVE-2026-13128 (CVSS 7.8) — Embedding JavaScript within a PDF file will cause the page to be deleted. Subsequent scripts will continue to …
    CVE-2026-57239 (CVSS 8.2) — The user-controllable executable files will be directly executed by high-privilege processes, allowing low-pri…
    CVE-2026-57240 (CVSS 7.8) — When the application opens a PDF file and JavaScript deletes the PDF fields, the subsequent logic still uses t…
    CVE-2026-13129 (CVSS 7.8) — When the application opens a PDF file, JavaScript uses the damaged field tree to trigger field traversal, resu…
    CVE-2026-57238 (CVSS 7.8) — After the application opened the PDF, JavaScript deleted the form field object. Subsequently, it attempted to …
    CVE-2026-57241 (CVSS 6.1) — The application opens the PDF, and JavaScript performs operations on the page and the document, causing the pa…
    CVE-2026-57242 (CVSS 7.8) — The application opens the PDF, and JavaScript modifies the form. However, the related objects on the page lack…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High