Detections
Analytics

Security Updates for Microsoft Office Products (June 2026) (macOS)

medium Nessus Plugin ID 321311

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Synopsis

The Microsoft Office product installed on the remote host is affected by multiple vulnerabilities

Description

The version of Microsoft Office for Mac installed on the remote host is affected by multiple vulnerabilities as referenced in the june-16-2026 advisory.

 - Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
 (CVE-2026-44819, CVE-2026-44824, CVE-2026-45461, CVE-2026-45463, CVE-2026-45472, CVE-2026-45474, CVE-2026-45475, CVE-2026-45645)

 - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network. (CVE-2026-44822, CVE-2026-45455)

 - Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally. (CVE-2026-44817, CVE-2026-44818, CVE-2026-44820, CVE-2026-44823, CVE-2026-45469)

 - Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally. (CVE-2026-45459)

 - Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.
 (CVE-2026-44821, CVE-2026-45460, CVE-2026-45485)

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

Solution

Update to Office for Mac version 16.110 or later.

See Also

http://www.nessus.org/u?4de225ff

Plugin Details

Severity: Medium

ID: 321311

File Name: macos_ms26_jun_office.nasl

Version: 1.3

Type: Local

Agent: macosx

Published: 6/17/2026

Updated: 6/22/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.93

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:P/A:N

CVSS Score Source: CVE-2026-44822

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2026-45455

Vulnerability Information

CPE: cpe:/a:microsoft:office

Required KB Items: Host/MacOSX/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 6/16/2026

Vulnerability Publication Date: 6/9/2026

Reference Information

CVE: CVE-2026-44817, CVE-2026-44818, CVE-2026-44819, CVE-2026-44820, CVE-2026-44821, CVE-2026-44822, CVE-2026-44823, CVE-2026-44824, CVE-2026-45455, CVE-2026-45456, CVE-2026-45457, CVE-2026-45458, CVE-2026-45459, CVE-2026-45460, CVE-2026-45461, CVE-2026-45463, CVE-2026-45466, CVE-2026-45469, CVE-2026-45471, CVE-2026-45472, CVE-2026-45474, CVE-2026-45475, CVE-2026-45485, CVE-2026-45486, CVE-2026-45643, CVE-2026-45645

IAVA: 2026-A-0570, 2026-A-0571, 2026-A-0576