Next.js Patches Critical AVIF and Windows Flaws Enabling Unauthenticated RCE
CVE-2026-75604 affects Windows. The published description indicates a remote or untrusted-network exploitation path.
What happened
A security weakness in Windows is being tracked as CVE-2026-75604. CVE-2026-75604 affects Windows. The Windows path traversal, tracked as CVE-2026-75604&.
js Patches Critical AVIF and Windows Flaws Enabling Unauthenticated RCE. Credit: Hacktron Vercel has released security patches for two critical-severity vulnerabilities in the Next. The reported consequence is code execution, meaning successful exploitation could make the affected application or process run attacker-controlled code.
js web framework, both of which allow unauthenticated remote code execution, one exploitable via specially crafted AVIF image files and the other through a path traversal flaw affecting servers that use a Windows filesystem. The published description indicates a remote or untrusted-network exploitation path. The available description indicates that the vulnerable path can be reached remotely or from an untrusted network, so the exposure of Windows becomes part of the attack condition.
Editorial note: this News Brief follows the available evidence and adds length only when additional facts or useful context are available. Where public reporting does not establish a specific victim sequence, CyberDeltaForce does not present one as fact.
What the reporting and advisory establish
Credit: Hacktron Vercel has released security patches for two critical-severity vulnerabilities in the Next.
js web framework, both of which allow unauthenticated remote code execution, one exploitable via specially crafted AVIF image files and the other through a path traversal flaw affecting servers that use a Windows filesystem.
js Patches Critical AVIF and Windows Flaws Enabling Unauthenticated RCE
A security weakness in Windows is being tracked as CVE-2026-75604. The flaw is described as a path traversal vulnerability. A path-traversal weakness can allow crafted input to make an application reach files or directories outside the location it was supposed to access. The available description indicates that the vulnerable path can be reached remotely or from an untrusted network, so the exposure of Windows becomes part of the attack condition. The reported consequence is code execution, meaning successful exploitation could make the affected application or process run attacker-controlled code. js web framework, both of which allow unauthenticated remote code execution, one exploitable via specially crafted AVIF image files and the other through a path traversal flaw affecting servers that use a Windows filesystem.
What this means for your environment
Move from the published facts to the technical path, exposure conditions and defensive decisions that matter in a real environment.
Attack & Exploitation Path
The sequence below shows how the vulnerability can be reached and what successful exploitation can produce. Each stage is labeled by evidence status.
an affected Windows instance is reachable from a network or remote position available to the attacker.
attacker-controlled network input reaches the vulnerable code path on the affected service.
the path traversal condition is triggered inside Windows, creating the security boundary failure described by the advisory.
successful exploitation can result in attacker-controlled code execution in the affected application or process.
the practical reach of successful code execution depends on the privileges and resources available to the affected process.
Why this matters to you
CVE-2026-75604 matters because the practical risk is not the score alone — it is whether Windows exists in your environment and whether the reported trigger or exposure path can reach it. No exploitation flag is currently present in the CDF data, but that does not remove the need to validate affected systems.
Does this deserve attention in my environment?
Check the conditions below against your use of Windows.
Select the conditions that are true in your environment. Leaving a condition unselected does not mean you are safe — it only means you have not marked it as applicable.
- Search endpoint, software and asset inventory for Windows.
- Confirm the vendor-recommended fixed version or mitigation and verify deployment, not just assignment, across affected assets.
- Review relevant endpoint, application, network or identity telemetry for activity associated with exploitation of the affected component.
- Track vendor and government guidance for any change in exploitation status while remediation is underway.
What remains unconfirmed
- Available reporting does not currently indicate exploitation, but that can change as vendor, government or threat-intelligence reporting develops.
Sources & References
Original reporting and technical references are kept here for readers who want to verify the facts. Publisher names stay out of the reading flow above.