Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.

The Microsoft Word Products are missing security updates. It is, therefore, affected by multiple remote code execution vulnerabilities that attackers can exploit to bypass authentication and execute unauthorized arbitrary commands.
(CVE-2026-20944, CVE-2026-20948)

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 Microsoft Office for Mac installed on the remote host is affected by multiple vulnerabilities as referenced in the january-13-2026 advisory.

  - Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
    (CVE-2026-20952, CVE-2026-20953)

  - Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to     execute code locally. (CVE-2026-20957)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
    (CVE-2026-20946)

  - Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security     feature locally. (CVE-2026-20949)

  - Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code     locally. (CVE-2026-20955, CVE-2026-20956)

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

The Microsoft Word Products are missing a security update. They are, therefore, affected by a remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2026-20948)

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

The Microsoft SharePoint Server 2019 installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - A remote code execution vulnerability. An attacker can     exploit this to bypass authentication and execute     unauthorized arbitrary commands. (CVE-2026-20948,     CVE-2026-62551, CVE-2026-62563)

  - A session spoofing vulnerability exists. An attacker can     exploit this to perform actions with the privileges of     another user. (CVE-2026-20958)

  - A information disclosure vulnerability exists. An     authorized attacker could use this to disclose     information over a network (CVE-2026-20959)

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

The Microsoft SharePoint Server Subscription Edition installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - A remote code execution vulnerability. An attacker can     exploit this to bypass authentication and execute     unauthorized arbitrary commands. (CVE-2026-20948,     CVE-2026-62551, CVE-2026-62563)

  - A session spoofing vulnerability exists. An attacker can     exploit this to perform actions with the privileges of     another user. (CVE-2026-20958)

  - A information disclosure vulnerability exists. An     authorized attacker could use this to disclose     information over a network (CVE-2026-20959)

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

The Microsoft SharePoint Server 2016 installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - A remote code execution vulnerability. An attacker can     exploit this to bypass authentication and execute     unauthorized arbitrary commands. (CVE-2026-20947,     CVE-2026-20948, CVE-2026-62551, CVE-2026-62563)

  - A session spoofing vulnerability exists. An attacker can     exploit this to perform actions with the privileges of     another user. (CVE-2026-20958)

  - A information disclosure vulnerability exists. An     authorized attacker could use this to disclose     information over a network (CVE-2026-20959)

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

ID	Name	Product	Family	Severity
283872	Security Updates for Microsoft Word Products C2R (January 2026)	Nessus	Windows	high
283480	Security Updates for Microsoft Office Products (January 2026) (macOS)	Nessus	MacOS X Local Security Checks	high
283476	Security Updates for Microsoft Word Products (January 2026)	Nessus	Windows : Microsoft Bulletins	high
283475	Security Updates for Microsoft SharePoint Server 2019 (January 2026)	Nessus	Windows : Microsoft Bulletins	critical
283469	Security Updates for Microsoft SharePoint Server Subscription Edition (January 2026)	Nessus	Windows : Microsoft Bulletins	critical
283468	Security Updates for Microsoft SharePoint Server 2016 (January 2026)	Nessus	Windows : Microsoft Bulletins	critical

Detections

Analytics

CVE-2026-20948

high

Tenable Plugins

high

high

high

critical

critical

critical