Acrobat Reader DC ActiveX Control versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated attacker could leverage this vulnerability to obtain NTLMv2 credentials. Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled web page.

The version of Adobe Reader installed on the remote macOS host is a version prior to 2017.011.30202, 2020.004.30015, or 2021.007.20091. It is, therefore, affected by multiple vulnerabilities.

  - Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199     (and earlier) are affected by a use-after-free vulnerability when processing AcroForm field that could     result in arbitrary code execution in the context of the current user. User interaction is required to     exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
    (CVE-2021-40726)

  - Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199     (and earlier) are affected by a Buffer Overflow vulnerability when parsing a specially crafted PDF file.
    An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the     context of the current user. Exploitation of this issue requires user interaction in that a victim must     open a malicious file. (CVE-2021-39863)

  - Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199     (and earlier) are affected by a Type Confusion vulnerability. An attacker could leverage this     vulnerability to execute arbitrary code in the context of the current user. Exploitation of this issue     requires user interaction in that a victim must open a malicious file. (CVE-2021-39841)

  - Adobe Acrobat Reader DC add-on for Internet Explorer versions 2021.005.20060 (and earlier), 2020.004.30006     (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An     unauthenticated attacker could leverage this vulnerability to check for existence of local files.
    Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled     web page. (CVE-2021-39857)

  - Acrobat Reader DC ActiveX Control versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and     2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated     attacker could leverage this vulnerability to obtain NTLMv2 credentials. Exploitation of this issue     requires user interaction in that a victim must visit an attacker controlled web page. (CVE-2021-39856)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Adobe Reader installed on the remote Windows host is a version prior to 2017.011.30202, 2020.004.30015, or 2021.007.20091. It is, therefore, affected by multiple vulnerabilities.

  - Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199     (and earlier) are affected by a use-after-free vulnerability when processing AcroForm field that could     result in arbitrary code execution in the context of the current user. User interaction is required to     exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
    (CVE-2021-40726)

  - Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199     (and earlier) are affected by a Buffer Overflow vulnerability when parsing a specially crafted PDF file.
    An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the     context of the current user. Exploitation of this issue requires user interaction in that a victim must     open a malicious file. (CVE-2021-39863)

  - Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199     (and earlier) are affected by a Type Confusion vulnerability. An attacker could leverage this     vulnerability to execute arbitrary code in the context of the current user. Exploitation of this issue     requires user interaction in that a victim must open a malicious file. (CVE-2021-39841)

  - Adobe Acrobat Reader DC add-on for Internet Explorer versions 2021.005.20060 (and earlier), 2020.004.30006     (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An     unauthenticated attacker could leverage this vulnerability to check for existence of local files.
    Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled     web page. (CVE-2021-39857)

  - Acrobat Reader DC ActiveX Control versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and     2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated     attacker could leverage this vulnerability to obtain NTLMv2 credentials. Exploitation of this issue     requires user interaction in that a victim must visit an attacker controlled web page. (CVE-2021-39856)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Adobe Acrobat installed on the remote Windows host is a version prior to 2017.011.30202, 2020.004.30015, or 2021.007.20091. It is, therefore, affected by multiple vulnerabilities.

  - Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199     (and earlier) are affected by a use-after-free vulnerability when processing AcroForm field that could     result in arbitrary code execution in the context of the current user. User interaction is required to     exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
    (CVE-2021-40726)

  - Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199     (and earlier) are affected by a Buffer Overflow vulnerability when parsing a specially crafted PDF file.
    An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the     context of the current user. Exploitation of this issue requires user interaction in that a victim must     open a malicious file. (CVE-2021-39863)

  - Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199     (and earlier) are affected by a Type Confusion vulnerability. An attacker could leverage this     vulnerability to execute arbitrary code in the context of the current user. Exploitation of this issue     requires user interaction in that a victim must open a malicious file. (CVE-2021-39841)

  - Adobe Acrobat Reader DC add-on for Internet Explorer versions 2021.005.20060 (and earlier), 2020.004.30006     (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An     unauthenticated attacker could leverage this vulnerability to check for existence of local files.
    Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled     web page. (CVE-2021-39857)

  - Acrobat Reader DC ActiveX Control versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and     2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated     attacker could leverage this vulnerability to obtain NTLMv2 credentials. Exploitation of this issue     requires user interaction in that a victim must visit an attacker controlled web page. (CVE-2021-39856)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Adobe Acrobat installed on the remote macOS host is a version prior to 2017.011.30202, 2020.004.30015, or 2021.007.20091. It is, therefore, affected by multiple vulnerabilities.

  - Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199     (and earlier) are affected by a use-after-free vulnerability when processing AcroForm field that could     result in arbitrary code execution in the context of the current user. User interaction is required to     exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
    (CVE-2021-40726)

  - Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199     (and earlier) are affected by a Buffer Overflow vulnerability when parsing a specially crafted PDF file.
    An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the     context of the current user. Exploitation of this issue requires user interaction in that a victim must     open a malicious file. (CVE-2021-39863)

  - Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199     (and earlier) are affected by a Type Confusion vulnerability. An attacker could leverage this     vulnerability to execute arbitrary code in the context of the current user. Exploitation of this issue     requires user interaction in that a victim must open a malicious file. (CVE-2021-39841)

  - Adobe Acrobat Reader DC add-on for Internet Explorer versions 2021.005.20060 (and earlier), 2020.004.30006     (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An     unauthenticated attacker could leverage this vulnerability to check for existence of local files.
    Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled     web page. (CVE-2021-39857)

  - Acrobat Reader DC ActiveX Control versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and     2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated     attacker could leverage this vulnerability to obtain NTLMv2 credentials. Exploitation of this issue     requires user interaction in that a victim must visit an attacker controlled web page. (CVE-2021-39856)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
153365	Adobe Reader < 2017.011.30202 / 2020.004.30015 / 2021.007.20091 Multiple Vulnerabilities (APSB21-55) (macOS)	Nessus	MacOS X Local Security Checks	high
153364	Adobe Reader < 2017.011.30202 / 2020.004.30015 / 2021.007.20091 Multiple Vulnerabilities (APSB21-55)	Nessus	Windows	high
153363	Adobe Acrobat < 2017.011.30202 / 2020.004.30015 / 2021.007.20091 Multiple Vulnerabilities (APSB21-55)	Nessus	Windows	high
153362	Adobe Acrobat < 2017.011.30202 / 2020.004.30015 / 2021.007.20091 Multiple Vulnerabilities (APSB21-55) (macOS)	Nessus	MacOS X Local Security Checks	high

Detections

Analytics

CVE-2021-39856

medium

Tenable Plugins

high

high

high

high