Security Flaw in Curl's SSH Connection Management Affects WolfSSH Backend

CVE-2025-10966

What is CVE-2025-10966?

CVE-2025-10966 is a significant vulnerability affecting the Curl software, specifically within its management of SSH connections when utilizing the wolfSSH backend for SFTP. Curl is a widely-utilized tool for transferring data with URLs, and its capabilities are integral to many applications and services relying on secure file transfers. The flaw in question revolves around the inadequate implementation of host verification mechanisms. This omission results in Curl's inability to properly detect man-in-the-middle (MITM) attacks, thereby exposing organizations to potential unauthorized access and data interception.

Organizations relying on Curl for secure file transfer operations could suffer severe disruptions as attackers might exploit this vulnerability to intercept and manipulate data. Without proper verification protocols, sensitive information can be compromised, leading to significant operational and reputational risks.

Potential Impact of CVE-2025-10966

1. Unauthorized Data Access: The vulnerability allows attackers to perform man-in-the-middle attacks, enabling them to intercept and access sensitive data during file transfers. This can lead to severe data breaches and loss of confidentiality.

2. Service Disruption: Exploiting this flaw can cause service interruptions as attackers manipulate data flows or disrupt legitimate file transfers, impacting business operations and leading to loss of productivity.

3. Trust Erosion: Organizations might face reputational damage due to perceived security weaknesses, affecting customer trust and potentially leading to decreased user engagement or loss of business opportunities.

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