DOD Apple iOS/iPadOS 26 devices must have a Mobile Threat Detection (MTD) app installed.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-278847	PP-MDF-993300	AIOS-26-017700	SV-278847r1151241_rule	2025-12-01	1

Description
DOD mobile devices are in constant risk of cyber threats. MTD apps partially mitigate these risks by providing real-time threat detection, malware prevention, and vulnerability analysis. SFR ID: FMT_MOF_EXT.1.2 #47

ℹ️ Check
Confirm an MTD app is installed on managed iPhones and iPads. This check procedure is performed on both the device management tool and the iPhone and iPad device. In the iOS/iPadOS management tool, verify an MTD app is listed as a managed app being deployed to site managed devices. On the iPhone/iPad device: 1. Open the Settings app. 2. Tap "General". 3. Tap "VPN & Device Management". 4. Tap the Configuration Profile from the iOS management tool containing the restrictions policy. 5. Tap "Apps". 6. Verify a MTD app is listed. If an MTD app is not installed on the device, this is a finding.

ℹ️ Check

Confirm an MTD app is installed on managed iPhones and iPads. This check procedure is performed on both the device management tool and the iPhone and iPad device. In the iOS/iPadOS management tool, verify an MTD app is listed as a managed app being deployed to site managed devices. On the iPhone/iPad device: 1. Open the Settings app. 2. Tap "General". 3. Tap "VPN & Device Management". 4. Tap the Configuration Profile from the iOS management tool containing the restrictions policy. 5. Tap "Apps". 6. Verify a MTD app is listed. If an MTD app is not installed on the device, this is a finding.

✔️ Fix
Deploy a site-approved MTD app via the MDM server to managed iPhones and iPads.