RPC Archives

AppWizard

April 29, 2026

Minecraft 26.2 Snapshot 5

The 26.2 Snapshot 5 introduces several new features, including an explosive archetype for the Sulfur Cube and the addition of erupting Geysers formed by Potent Sulfur. The new Sulfur Cube archetype, called Explosive, shares properties with the Regular archetype but has higher air drag and can absorb TNT blocks. When primed, absorbed TNT has a fuse time of 6 seconds when ignited by fire or Redstone, and a randomized fuse time between 0.75 and 3 seconds when primed by an explosion. Sulfur Cubes with absorbed TNT cannot be picked up or damaged, and no Small Sulfur Cubes will spawn upon explosion. Potent Sulfur creates Geysers when placed above a Magma block and under water, sending water particles skyward at random intervals. Various adjustments have been made to mob hitboxes, and Hoglins are now classified as hostile and will not spawn on Peaceful difficulty. New sounds for Geyser eruptions have been added, and Touchscreen Mode has been removed. The Data Pack version is now 104.0, and the Resource Pack version is 86.2. New particles related to Geysers have been introduced, and several bugs have been fixed in this update.

Winsage

April 28, 2026

‘Unlimited Attack Vectors’—All Windows Versions At Risk From New Flaw

Microsoft is facing a significant security vulnerability in its Windows operating system known as PhantomRPC, which allows for privilege escalation. Cybersecurity experts have expressed concern over the company's delayed response in issuing a patch for this flaw. The vulnerability resides within the Windows Remote Procedure Call (RPC) architecture and enables processes with impersonation privileges to elevate their permissions to SYSTEM level. Researcher Haidar Kabibo identified five distinct paths for exploitation, which require user interaction, coercion, or compromise of background services. Despite disclosing the vulnerability to Microsoft in September 2025, the company categorized it as moderately severe and did not issue a patch or a Common Vulnerabilities and Exposures (CVE) listing. Microsoft stated that the technique requires an already-compromised machine and emphasized the importance of following security best practices. Experts have criticized Microsoft's lack of action, arguing that it is operationally negligent and places the burden of risk management on users. In the absence of a patch, security professionals recommend focusing on access control and environmental hygiene to mitigate the risks associated with the vulnerability.

Winsage

April 25, 2026

New Windows RPC Vulnerability Lets Attackers Escalate Privileges Across All Windows Versions

PhantomRPC is a significant architectural vulnerability in the Windows Remote Procedure Call (RPC) framework that allows local privilege escalation to SYSTEM-level access across all Windows versions. Discovered by Kaspersky's Haidar Kabibo at Black Hat Asia 2026, this vulnerability stems from the RPC runtime's failure to verify the legitimacy of a responding server during calls to offline or disabled servers. Attackers can exploit this by setting up a malicious RPC server that impersonates a legitimate endpoint, using the RpcImpersonateClient API to escalate privileges from low-privileged accounts to SYSTEM or Administrator levels. Five distinct exploitation paths have been identified: 1. gpupdate.exe coercion: An attacker can intercept an RPC call made by the Group Policy Client service when executing gpupdate /force, granting SYSTEM-level access if TermService is disabled. 2. Microsoft Edge startup: Launching msedge.exe triggers an RPC call to TermService, allowing privilege escalation from Network Service to Administrator via a spoofed endpoint. 3. WDI background service: The Diagnostic System Host polls TermService regularly, enabling an attacker to exploit this without user interaction. 4. ipconfig.exe and DHCP Client: Running ipconfig.exe initiates an RPC call to the DHCP Client service, allowing a Local Service attacker to elevate privileges if DHCP is disabled and a fake server is present. 5. w32tm.exe and Windows Time: An attacker can expose a named pipe endpoint, allowing them to impersonate any privileged user executing the Windows Time executable. The vulnerability was reported to Microsoft on September 19, 2025, but Microsoft categorized it as moderate severity and closed the case without a patch, as the attack requires SeImpersonatePrivilege, which is granted by default to certain accounts. Organizations are advised to implement defensive measures such as enabling RPC monitoring, ensuring legitimate services are running, and restricting SeImpersonatePrivilege. Kaspersky has provided tools for auditing environments for exploitable RPC call patterns through the PhantomRPC GitHub repository.