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    CVE-2021-39851

    Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a Null pointer dereference vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

    Published:Sep 29, 2021
    Last Modified:Nov 21, 2024
    EPS:Sep 29, 2021
    EPSS Score:0.01014
    CVSS Score:5.5

    Affected Products

    Vendor
    Adobe
    Product
    Acrobat
    Vendor
    Adobe
    Product
    Acrobat Dc
    Vendor
    Adobe
    Product
    Acrobat Reader
    Vendor
    Adobe
    Product
    Acrobat Reader Dc
    Vendor
    Apple
    Product
    Macos
    Vendor
    Microsoft
    Product
    Windows

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-81984 (CVSS 5.5) — Acrobat Reader is affected by a Use After Free vulnerability that could lead to disclosure of sensitive memory…
    CVE-2026-81989 (CVSS 7.8) — Acrobat Reader is affected by a Use After Free vulnerability that could result in arbitrary code execution in …
    CVE-2026-81991 (CVSS 5.5) — Acrobat Reader is affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive m…
    CVE-2026-81980 (CVSS 7.8) — Acrobat Reader is affected by an out-of-bounds write vulnerability that could result in arbitrary code executi…
    CVE-2026-81990 (CVSS 7.8) — Acrobat Reader is affected by a Use After Free vulnerability that could result in arbitrary code execution in …
    CVE-2026-81987 (CVSS 7.8) — Acrobat Reader is affected by an Integer Overflow or Wraparound vulnerability that could result in arbitrary c…
    CVE-2026-79910 (CVSS 5.5) — Acrobat Reader is affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive m…
    CVE-2026-81993 (CVSS 5.5) — Acrobat Reader is affected by a Heap-based Buffer Overflow vulnerability that could lead to disclosure of sens…
    CVE-2026-79907 (CVSS 7.8) — Acrobat Reader is affected by a Double Free vulnerability that could result in arbitrary code execution in the…
    CVE-2026-79909 (CVSS 7.8) — Acrobat Reader is affected by a Use After Free vulnerability that could result in arbitrary code execution in …

    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