CVE Feed

    Dashboard / CVE / CVE-2021-21893

    CVE-2021-21893

    A use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader, version 11.0.0.49893. A specially crafted PDF document can trigger the reuse of previously freed memory, which can lead to arbitrary code execution. An attacker needs to trick the user to open the malicious file to trigger this vulnerability. Exploitation is also possible if a user visits a specially crafted, malicious site if the browser plugin extension is enabled.

    Published:Aug 5, 2021
    Last Modified:Nov 21, 2024
    EPS:Aug 5, 2021
    EPSS Score:0.00424
    CVSS Score:8.8

    Affected Products

    Vendor
    Foxit
    Product
    Pdf Reader

    Exploits

    https://talosintelligence.com/vulnerability_reports/TALOS-2021-1336https://talosintelligence.com/vulnerability_reports/TALOS-2021-1336

    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-2026-5937 (CVSS 5.5) — Insufficient parameter verification leads to the occurrence of format errors in files, which will trigger an u…
    CVE-2026-5938 (CVSS 5.5) — Improper control flow management allows a crafted document action chain to cause modal dialog reentry on the m…
    CVE-2026-5940 (CVSS 7.8) — Calling a function that triggers a UI refresh after removing comments via a script may access an invalidated o…
    CVE-2026-5942 (CVSS 5.5) — Flaws in page lifecycle management allow document structure changes to desynchronize internal component states…
    CVE-2026-5943 (CVSS 7.8) — Document structural anomalies caused inconsistencies between page element relationships and internal index sta…
    CVE-2026-5939 (CVSS 5.5) — A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the applic…
    CVE-2026-5941 (CVSS 7.8) — Parsing logic flaws cause non-signature data to be misidentified as valid signatures when processing malformed…
    CVE-2026-3774 (CVSS 4.7) — The application allows PDF JavaScript and document/print actions (such as WillPrint/DidPrint) to update form f…
    CVE-2026-3775 (CVSS 7.8) — The application's update service, when checking for updates, loads certain system libraries from a search path…

    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