Which of the following should be an IS auditor's GREATEST concern when assessing an IT service configuration database?

While a lack of encryption at rest is a security concern regarding data confidentiality, it does not pose as immediate a threat to the integrity and operational stability of the configuration data as unrestricted write access.

Read-access for all users primarily raises concerns about information disclosure, which is a confidentiality issue, not directly impacting the integrity of the configuration database itself.

A database file being 'executable' for all users is an unusual and typically incorrect description; database files themselves are data stores, not executables, so this is not a primary or relevant concern.

If an IT service configuration database is write-accessible for all users, it significantly increases the risk of unauthorized or accidental changes, leading to system misconfigurations, service outages, and potential security vulnerabilities due to compromised data integrity.