Microsoft reported on Saturday that multiple subsea fiber-optic cables were severed in the Red Sea on September 6, 2025, disrupting internet connectivity and causing increased latency for users of its Azure cloud platform. The cable cuts have affected data routes between Asia, the Middle East, and Europe, prompting global rerouting efforts to maintain service continuity.
The company issued a service health alert stating that Azure customers may experience delays when data originates or terminates in regions connected through the affected corridor. Microsoft is actively monitoring the situation, rebalancing traffic, and optimizing alternative routes to minimize user impact while full restoration efforts are underway.
The disruptions involve at least two major international cable systems SEA-ME-WE 4 and IMEWE which traverse the Red Sea and connect multiple continents. These cable systems are essential to global internet infrastructure, carrying a significant share of data between South Asia, the Gulf region, and Europe. The simultaneous damage to multiple cables in the same area has raised concerns about the resilience of undersea infrastructure in a geopolitically sensitive zone.
Internet monitoring groups have confirmed widespread service degradation across countries including India, Pakistan, the UAE, and others in South Asia and the Gulf. While overall connectivity has not been lost, the resulting congestion on alternative routes has led to noticeable slowdowns, especially for enterprise-level services relying on high-speed and low-latency data transfer.
Subsea cable failure affects global cloud infrastructure
Microsoft emphasized that no Azure services have been taken offline, and that traffic is being rerouted using available capacity across unaffected segments of the global network. However, the company cautioned that undersea cable repairs typically require specialized vessels and can take weeks to complete, particularly in regions with maritime security risks and limited infrastructure access.
The cause of the cable damage remains under investigation. No group has claimed responsibility, and regional actors have not provided definitive explanations. Speculation around potential sabotage has circulated due to the strategic importance of the affected area and ongoing regional conflicts, but no evidence has yet been presented to support such claims.
The incident highlights the growing vulnerability of global communications networks that depend heavily on submarine cables. Approximately 95 percent of international data traffic is transmitted via these undersea systems. Damage to a small number of cables in high-traffic corridors like the Red Sea can have outsized effects on global connectivity and cloud service performance.
Red Sea cable repairs may take weeks to complete
Telecommunications providers and cloud platforms are now assessing broader implications for resilience planning, including the need for alternative data routes, enhanced monitoring capabilities, and faster deployment of repair assets. The current outage underscores the risk of over-dependence on narrow chokepoints for international data transit.
With network traffic still flowing through alternative pathways, users in impacted regions may continue to experience slower-than-normal service over the coming days. Microsoft has committed to providing daily updates on repair progress and routing adjustments. Network engineers are working to stabilize affected traffic as international repair operations prepare to address the damage.
The disruption serves as a stark reminder of the physical fragility behind the world’s digital infrastructure. As reliance on cloud computing and international data exchange continues to grow, ensuring the security and redundancy of submarine cable networks has become an increasingly urgent global priority.