Security Updates for Microsoft Office Online Server (July 2026)

The Microsoft Office Online Server or Office Web Apps installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities: - Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally. CVE-2026-47642,...

PT-2026-58239

Name of the Vulnerable Software and Affected Versions Microsoft Windows Media Foundation affected versions not specified Description A heap-based buffer overflow exists in Microsoft Windows Media Foundation. This issue allows an unauthorized attacker to execute code locally or achieve remote code...

PT-2026-58643

Name of the Vulnerable Software and Affected Versions Windows Resilient File System ReFS affected versions not specified Description A heap-based buffer overflow occurs in the Windows Resilient File System ReFS, which is a file system designed for high availability and scalability. This flaw allo...

PT-2026-58169

Name of the Vulnerable Software and Affected Versions Windows NTFS affected versions not specified Description A heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute arbitrary code locally and remotely, potentially affecting the entire system. A heap-based buffer...

PT-2026-58570

Name of the Vulnerable Software and Affected Versions Microsoft Office Word affected versions not specified Description A heap-based buffer overflow exists in Microsoft Office Word, which could allow an unauthorized attacker to execute code locally. This issue can be triggered via the Preview Pan...

PT-2026-58368

Name of the Vulnerable Software and Affected Versions Windows NTFS affected versions not specified Description An out-of-bounds read in Windows NTFS allows an unauthorized attacker to execute code locally. An out-of-bounds read occurs when a program reads data past the end of the intended buffer,...

PT-2026-58518

Use after free in Windows DHCP Client allows an unauthorized attacker to execute code locally...

PT-2026-58575

Name of the Vulnerable Software and Affected Versions Microsoft Office Word affected versions not specified Description A double free issue exists in Microsoft Office Word, which allows an unauthorized attacker to execute code locally. This occurs when a victim opens a specially crafted file,...

PT-2026-58443

Name of the Vulnerable Software and Affected Versions Microsoft Office affected versions not specified Description A use after free issue exists in Microsoft Office, which could allow an unauthorized attacker to execute code locally. This occurs when a user opens a specially crafted file locally ...

PT-2026-58345

Name of the Vulnerable Software and Affected Versions Windows Resilient File System ReFS affected versions not specified Description A heap-based buffer overflow exists in the Windows Resilient File System ReFS, which allows an unauthorized attacker to execute code locally. This issue occurs duri...

PT-2026-58549

Name of the Vulnerable Software and Affected Versions Microsoft Office affected versions not specified Description An out-of-bounds read allows an unauthorized attacker to execute code locally. This issue requires local access to the system to run code through the application. Recommendations At...

PT-2026-58583

Name of the Vulnerable Software and Affected Versions Microsoft Office affected versions not specified Description A heap-based buffer overflow occurs when a program writes more data to a heap memory block than it can hold, potentially corrupting memory. This issue allows an unauthorized attacker...

PT-2026-58572

Name of the Vulnerable Software and Affected Versions Microsoft Office affected versions not specified Description A heap-based buffer overflow exists in Microsoft Office, which allows an unauthorized attacker to execute code locally. This can occur through the processing of malicious files and...

PT-2026-58534

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel affected versions not specified Description A heap-based buffer overflow exists in Microsoft Office Excel, which could allow an unauthorized attacker to execute arbitrary code locally. A heap-based buffer overflow occurs...

PT-2026-58544

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel affected versions not specified Description An integer underflow wrap or wraparound occurs when an arithmetic operation results in a value smaller than the minimum representable value for the data type, causing it to wra...

PT-2026-58589

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel affected versions not specified Description A heap-based buffer overflow occurs when a program writes more data to a heap memory block than it can hold, potentially corrupting memory. This issue allows an unauthorized...

PT-2026-58571

Name of the Vulnerable Software and Affected Versions Microsoft Office Word affected versions not specified Description A use after free issue exists that allows an unauthorized attacker to execute arbitrary code locally or remotely, potentially affecting the system. Use after free is a memory...

PT-2026-58805

Name of the Vulnerable Software and Affected Versions .NET Framework affected versions not specified Description A protection mechanism failure allows an unauthorized attacker to execute arbitrary code locally or remotely, potentially compromising the system. Recommendations At the moment, there ...

PT-2026-58560

Name of the Vulnerable Software and Affected Versions Microsoft Office affected versions not specified Description A heap-based buffer overflow occurs when a program writes more data to a heap memory block than it can hold, potentially corrupting memory. This issue allows an unauthorized attacker...

Security Updates for Microsoft Office Products (July 2026)

The Microsoft Office Products are missing a security update. They are, therefore, affected by multiple vulnerabilities: - Out-of-bounds read in Microsoft Office allows an unauthorized attacker to execute code locally. CVE-2026-55045 - Heap-based buffer overflow in Microsoft Office allows an...