Full Report
The Department of Defense’s (DOD) efforts to modernize GPS continue to face delays. In response, DOD is developing new complementary sources of positioning, navigation, and timing (PNT) data to mitigate GPS threats. In 2026, after years of delays, DOD canceled the Next Generation Operational Control System ground control system and began modernizing the existing GPS…
Analysis Summary
# Vulnerability: Vulnerability of Military GPS to Jamming and Interference
## CVE Details
- **CVE ID**: Not applicable (Structural/Architectural vulnerability)
- **CVSS Score**: N/A (High Mission Impact)
- **CWE**: CWE-290 (Authentication Bypass by Spoofing), CWE-400 (Uncontrolled Resource Consumption - Interference)
## Affected Systems
- **Products**: Global Positioning System (GPS) Ground Control Systems and Military Receivers.
- **Versions**:
- Next Generation Operational Control System (OCX) — *Canceled*.
- Legacy GPS Operational Control Segment (OCS).
- M-code aviation receiver programs.
- **Configurations**: Military aircraft, ground vehicles, and naval ships utilizing GPS for Positioning, Navigation, and Timing (PNT).
## Vulnerability Description
The vulnerability stems from the delay and subsequent cancellation of the Next Generation Operational Control System (OCX), forcing continued reliance on modernized legacy systems. The core issue is the susceptibility of standard GPS signals to electronic warfare, specifically signal interference (jamming) and signal manipulation (spoofing). While "M-code" is intended to provide a more secure, jam-resistant signal, integration delays in aviation and ground systems leave military assets reliant on legacy PNT data that lacks robust modern encryption and anti-jamming capabilities.
## Exploitation
- **Status**: Exploited in the wild (Electronic warfare/Jamming reported in conflict zones).
- **Complexity**: Medium
- **Attack Vector**: Physical (Radio Frequency/Electronic Warfare)
## Impact
- **Confidentiality**: Low (Signal is broadcast, though M-code encrypts specific data).
- **Integrity**: High (Risk of spoofing leads to incorrect positioning/navigation).
- **Availability**: High (Jamming can render PNT data completely unavailable for mission-critical operations).
## Remediation
### Patches
- **Modernization**: Transitioning to the modernized GPS Operational Control Segment following the 2026 cancellation of OCX.
- **M-code Implementation**: Continued rollout of M-code receiver cards to provide higher power and encrypted signals.
### Workarounds
- **MAPS GEN II**: Implementation of Mounted Assured PNT System (MAPS) which includes anti-jam and anti-spoof exterior antennas for ground vehicles.
- **Complementary PNT**: Development of non-satellite-based PNT systems and backup timing solutions (e.g., inertial navigation, pseudolites).
- **Interim Navy Solutions**: The Navy is developing stop-gap M-code integration for aircraft while long-term aviation receivers remain in development.
## Detection
- **Indicators of compromise**: Signal "denial of service" (loss of GPS lock), PNT data drift, or inconsistent coordinates between GPS and inertial backup systems.
- **Detection methods and tools**: Multi-PNT receivers that cross-check GPS data against alternative sources (e.g., Galileo, terrestrial beacons, or internal clocks) to identify anomalies.
## References
- **GAO Report**: hxxps[:]//www[.]gao[.]gov/products/gao-27-107676
- **Threat Beat Advisory**: hxxps[:]//threatbeat[.]com/government-and-industry/gao-military-gps-vulnerable-to-interference-and-jamming/