CVE-2025-62955 is a vulnerability classified under CWE-497, indicating exposure of sensitive system information to an unauthorized control sphere. It affects the HappyDevs TempTool software up to version 1.3.1. The vulnerability allows an attacker with network access and low privileges (PR:L) to remotely retrieve embedded sensitive data without requiring user interaction (UI:N). The CVSS 3.1 base score is 4.3 (medium), reflecting a low impact on confidentiality (C:L), no impact on integrity (I:N) or availability (A:N), and an attack vector over the network (AV:N) with low attack complexity (AC:L). The vulnerability does not require user interaction and does not escalate privileges but exposes sensitive information that could be leveraged for further attacks or reconnaissance. No patches or exploit code are currently available, and the vulnerability was published on December 21, 2025. The lack of patches means organizations must rely on compensating controls until an official fix is released. The vulnerability’s nature suggests that sensitive data embedded within the TempTool application or its environment can be extracted by unauthorized users, potentially including configuration details, credentials, or system information.

For European organizations, the exposure of sensitive system information can lead to increased risk of targeted attacks, including privilege escalation, lateral movement, or data breaches. Although the immediate impact on system integrity and availability is none, the confidentiality loss can undermine trust and compliance with data protection regulations such as GDPR. Organizations in sectors like manufacturing, energy, and government that rely on TempTool for system monitoring or control may face operational risks if attackers use the leaked information to craft sophisticated attacks. The vulnerability could also expose sensitive configuration or credential data, facilitating unauthorized access to critical systems. The absence of known exploits reduces immediate risk, but the potential for future exploitation necessitates vigilance. The medium severity rating indicates that while the threat is not critical, it should not be ignored, especially in environments with high security requirements.

1. Immediately restrict network access to TempTool instances using firewalls or network segmentation to limit exposure to trusted users only. 2. Implement strict access controls and monitor logs for unusual access patterns or data retrieval attempts related to TempTool. 3. Conduct an inventory of all TempTool deployments and assess the sensitivity of data potentially exposed. 4. Until a patch is released, consider disabling or uninstalling TempTool where feasible, especially in high-risk environments. 5. Apply principle of least privilege to accounts interacting with TempTool to minimize potential exploitation. 6. Engage with HappyDevs for updates on patch availability and apply security updates promptly once released. 7. Use intrusion detection systems (IDS) to detect anomalous network traffic targeting TempTool. 8. Educate IT and security teams about this vulnerability to ensure rapid response if exploitation attempts are detected.