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Welcome to April 2025’s Patch Tuesday! This month, Microsoft released 121 security updates, while Apple addressed around 130 vulnerabilities in macOS Sequoia 15.4 — covering everything from kernel-level issues to media processing flaws.
Whether you're managing Windows or macOS environments, staying current with patches this cycle is critical. For a deeper dive into the technical details and real-world implications, check out the latest Patch [FIX] Tuesday podcast episode.
Below is a breakdown of how this month compares to the past year’s Patch Tuesday releases:
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CVE-2025-27480 [Critical]
Windows Remote Desktop Services Remote Code Execution Vulnerability
This vulnerability (CVSS 8.1/10) affects the Remote Desktop Gateway service in Windows and stems from a use-after-free bug. It allows attackers to execute code over the network without the need for login credentials or user interaction. The exploit is triggered by a race condition in memory allocation, giving attackers a chance to reclaim and manipulate freed memory during remote sessions. If successful, arbitrary code execution is possible, potentially giving full control over the system.
While exploitation requires technical precision, this is a network-based attack that demands serious attention. An attacker doesn’t need stolen credentials or user interaction — just access to an exposed Remote Desktop Gateway. That makes it especially dangerous in hybrid or remote-first environments where external connectivity is common. Once inside, the attacker can potentially use the compromised system to move laterally through a network. If your gateway is internal-only or protected by a VPN, the risk drops, but it’s still essential to monitor exposure and apply patches promptly.
Given the network-based nature of this vulnerability and the risk it poses to exposed systems and their networks, reviewing how Remote Desktop Gateways are accessed is essential. Public-facing gateways should be minimized, and those that remain accessible need strong access controls in place. Patching affected systems promptly, combined with best-practice network segmentation and effective monitoring, offers a more resilient defense against potential compromise.
– Ryan Braunstein, Security Manager, Automox
CVE-2025-29824 [Important]
Windows Common Log File System Driver Elevation of Privilege Vulnerability
This vulnerability (CVSS 7.8) affects the Windows Common Log File System (CLFS) driver, which plays a central role in system and application logging. It involves a use-after-free condition that allows a local attacker to elevate privileges from a standard user to SYSTEM. This level of access gives complete control over the affected system. Notably, this is a zero-day vulnerability — actively exploited in the wild before a fix was available.
The risk is significant. An attacker with initial access — whether through phishing, malware, or stolen credentials — can use this flaw to bypass normal privilege restrictions. With SYSTEM-level control, they can install payloads, disable protections, and move laterally across your environment with few barriers.
Given the active exploitation, patching systems affected by this vulnerability should be a top priority. It’s also important to monitor for signs of misuse. Enforcing least-privilege policies, keeping endpoint defenses current, and using behavioral analytics through a SIEM can help detect and contain any escalation attempts.
– Seth Hoyt, Senior Security Engineer, Automox
CVE-2025-24243 [High]
macOS Sequoia 15.4 Audio Vulnerability
This vulnerability (CVSS 7.8, per CISA ADP) targets the audio component in macOS and can be exploited through a specially crafted media file. If processed, the file may lead to arbitrary code execution — giving an attacker control without requiring user interaction. For environments where audio playback or media handling is routine, this kind of flaw increases risk without much warning.
The potential impact extends to both personal and enterprise systems, particularly in creative or collaborative settings where media files are shared frequently. It highlights how vulnerabilities can emerge from everyday workflows, especially when tied to core system components like audio services.
For those running macOS Sequoia 15.4, applying the latest patches is essential. Apple addressed more than 130 CVEs in this release, reflecting the broad scope of security updates. Regular patching, especially in media-rich environments, helps reduce exposure and limits the risk posed by files that may otherwise seem harmless.
– Henry Smith, Senior Security Engineer, Automox
Patch Regularly, Patch Often
Patching continues to be one of the most reliable ways to defend against known vulnerabilities. Even in quieter months, timely updates reduce the risk of compromise — from network-based exploits to local privilege escalation and everything in between. Pairing patch management with routine audits and strong access controls builds a stronger security posture over time.
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