Vulnerabilities
CVE-2026-105598: Microsoft Office Access Heap Overflow Enables Remote Code Execution
A heap-based buffer overflow in Microsoft Office Access (CVE‑2026‑105598) allows attackers to run arbitrary code over a network. The flaw is exploitable without user interaction and can be triggered by crafted Access files. Defenders should apply the latest Office updates and restrict network exposure of Access documents.
What happened
A heap‑based buffer overflow was discovered in Microsoft Office Access. The flaw permits an attacker to execute arbitrary code on a target system by sending a specially crafted Access file over the network.
Impact
Remote code execution can lead to full system compromise, credential theft, or lateral movement within an organization. The vulnerability is exploitable without user interaction and can be triggered from a remote host.
Mitigation
Microsoft has released a security update for all supported Office Access versions. Apply the latest cumulative update or install the specific Office Access patch as soon as possible.
What to do
- Verify that all Office installations are up to date and that the CVE‑2026‑105598 patch is applied.
- Restrict network access to Office Access files and services, using firewall rules or network segmentation.
- Monitor for anomalous process creation or unexpected network connections originating from Office processes.
- Educate users to avoid opening unknown Access files, especially from untrusted sources.
Related vulnerabilities
CVE-2026-105591: Microsoft Office Access Remote Code Execution Vulnerability
A heap-based buffer overflow in Microsoft Office Access allows an unauthenticated attacker to execute arbitrary code over the network via a crafted database file. Microsoft has released a patch; defenders should update immediately and restrict network exposure of Access.
Read briefing
CVE-2026-102850: Microsoft Office Access Remote Code Execution via Heap Overflow
A heap‑based buffer overflow in Microsoft Office Access (CVE‑2026‑102850) allows an unauthenticated attacker to execute code over a network. The flaw can be triggered by a crafted Access file. Defenders should apply the latest Office updates immediately and consider disabling Access on untrusted networks.
Read briefing
CVE-2026-68836: Local Privilege Escalation via Heap Overflow in Windows kernel32.dll
A heap-based buffer overflow in Windows kernel32.dll can be exploited by an authenticated user to gain SYSTEM privileges. The flaw affects all Windows systems lacking the latest security updates. Defenders should verify patch status and enforce least privilege.
Read briefing
Ubuntu Kernel Vulnerabilities - Oct 2026
Multiple vulnerabilities have been disclosed affecting the Linux kernel in Ubuntu. These vulnerabilities allow for potential remote code execution, privilege escalation, and denial-of-service conditions. Defenders should prioritize patching systems according to the provided Ubuntu Security Notices.
Read briefing