Critical vulnerabilities and CVEs
- CVE-2026-65775 – Windows Win32k Elevation of Privilege Vulnerability. This affects the Win32k subsystem used by Windows to render windowing and graphics operations. An attacker could exploit this to gain higher privileges on a system. Acknowledgement updated (informational).
- CVE-2026-65776 – Windows Win32k Elevation of Privilege Vulnerability. Similar class risk to CVE-65775, tied to the same subsystem. Acknowledgement updated (informational).
- CVE-2026-62823 – Windows DHCP Server Remote Code Execution Vulnerability. This impacts DHCP servers and could allow remote code execution, enabling attackers to take control of affected servers. Acknowledgement updated (informational).
- CVE-2026-62889 – Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability. Potential RCE path via SSTP, with exploitation risk on exposed VPN endpoints. Acknowledgement updated (informational).
- CVE-2026-59134 – Remote Desktop Client Remote Code Execution Vulnerability. RDP-related issue that could enable remote code execution in certain conditions. Acknowledgement updated.
- CVE-2026-49177 – Windows TCP/IP Information Disclosure Vulnerability. Information disclosure risk within the network stack; information exposure could assist targeted attacks. Acknowledgement updated (informational).
- CVE-2026-55134 – Microsoft Word Remote Code Execution Vulnerability. Word-related RCE risk that could affect document processing workflows. Acknowledgement updated (informational).
- CVE-2026-50448 – Windows NTFS Remote Code Execution Vulnerability. NTFS subsystem RCE risk that could be leveraged in lateral movement scenarios. Acknowledgement updated (informational).
- CVE-2026-50344 – Windows OLE Elevation of Privilege Vulnerability. Privilege escalation vector tied to OLE components. Acknowledgement updated (informational).
- CVE-2026-50462 – Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability. EoP path affecting networking drivers. Acknowledgement updated (informational).
- CVE-2026-26174 – Windows Server Update Service (WSUS) Elevation of Privilege Vulnerability. Privilege escalation risk within WSUS infrastructure. Acknowledgement updated (informational).
- CVE-2026-64899 – Microsoft Office Information Disclosure Vulnerability. Information disclosure advisory; updated acknowledgement only. This is informational, but organisations that handle sensitive documents should verify updates are applied to reduce exposure.
- CVE-2026-68821 – Windows Package Manager Elevation of Privilege Vulnerability. EoP risk within the package manager; pertains to newer management tooling. Acknowledgement updated; note the date shows 29 August 2026.
Affected Microsoft products and scope
- Windows operating systems and components (Win32k, network stack, NTFS, OLE, WinSock, RDP/Remote Desktop Client, SSTP, DHCP Server) are impacted across multiple CVEs, indicating a broad risk surface for endpoints, servers, and VPN gateways.
- Microsoft Word and Office components are named in at least one advisory, underscoring a potential vector for document-based attacks.
- WSUS and package management tooling are also mentioned as part of privilege escalation exposure in update infrastructure and management tooling.
Why this matters for UK businesses
- Elevation of Privilege (EoP) vulnerabilities can enable attackers who have already compromised a user account or an initial foothold to gain admin rights on a system, unleashing broader access, data exfiltration, or ransomware deployment.
- Remote Code Execution (RCE) flaws, particularly in Windows DHCP Server, SSTP, and RDP scenarios, increase the risk of remote compromises, especially for exposed services such as VPNs or public-facing servers.
- Information disclosure weaknesses (for example, the Windows TCP/IP vulnerability) can aid attackers in reconnaissance and targeted attacks, enabling more effective multi-stage intrusions.
- The table of affected products spans endpoints and server roles commonly found in UK SMEs and larger enterprises; many UK organisations rely on WSUS, Active Directory-integrated services, and remote access tools, all of which can be hit by these CVEs.
Risks of delaying patches
- Exploitation windows exist even for informational updates—attackers actively scan for unpatched systems.
- RCE and EoP bugs are particularly dangerous in enterprise environments where lateral movement can occur via compromised credentials or exposed services.
- Patch management can be complex in UK organisations with mixed on-premises and cloud workloads; delaying updates increases the likelihood of successful exploitation during busy maintenance windows.
How Silicon Spa Tech Services helps organisations stay Cyber Essentials compliant
- Proactive patch management aligned with UK Cyber Essentials and NHS/public-sector frameworks, ensuring critical and high-severity CVEs are prioritized and tested in staged environments.
- Configuration hardening and vulnerability scanning to identify exposed services (RDP, VPN endpoints, DNS, DHCP) and reduce attack surfaces before updates are deployed.
- Endpoint protection guidance, user awareness training for phishing and document-based attack vectors (Word/Office), and governance around software updates to reduce risk.
- Assurance for your patch program with documented evidence, change control, and audit-ready reporting to support compliance reviews and board-level risk discussions.
- Dedicated UK-based support from our Royal Leamington Spa team, with flexible SLAs to fit small businesses and larger organisations alike.
Next steps
To protect your organisation and maintain Cyber Essentials compliance, act quickly on Patch Tuesday advisories. If you’d like tailored patch management and security support, our team can help you prioritise updates, test compatibility, and implement patches with minimal downtime.
Reach out to us today via our contact page to discuss patch management and security support for your organisation: https://www.siliconspatechservices.com/contact-us
Author Profile
Cyber Security Analyst specialising in vulnerability management, Patch Tuesday analysis, and SME security hardening. She focuses on translating complex CVEs into clear, practical guidance for UK businesses, helping organisations strengthen their Cyber Essentials posture and stay ahead of emerging threats
- Chloe Morris
- Chloe Morris
- Chloe Morris
- Chloe Morris
