Singapore Security Report — February 25, 2026

Security analysis based on open-source intelligence and web research. Period: February 18 — February 25, 2026.

Executive Summary

Singapore faced a dynamic security landscape between February 18 and February 25, 2026, marked by significant cybersecurity challenges and a proactive stance on national defense. A major development was the public disclosure of "Operation Cyber Guardian," which successfully thwarted sophisticated cyberattacks by a China-linked advanced persistent threat (APT) group targeting Singapore's telecommunications infrastructure. Concurrently, the nation continued its comprehensive "Exercise SG Ready 2026" to enhance resilience against digital and power disruptions, alongside routine military exercises by the Singapore Armed Forces. Economically, new tariffs imposed by the United States presented a diplomatic and trade challenge, while Singapore reiterated its commitment to increasing security expenditures amidst a more volatile global environment. These events underscore Singapore's multi-faceted approach to safeguarding its national interests, balancing robust defense capabilities with strategic diplomatic engagement and internal resilience building.

Key Security Developments

• Cybersecurity Incident: Chinese-nexus APT Attack Disrupted
  Singapore successfully disrupted sophisticated cyberattacks attributed to the China-linked advanced persistent threat (APT) group UNC3886, which targeted the country's four major telecommunications operators: M1, SIMBA Telecom, Singtel, and StarHub. The operation, dubbed "Operation Cyber Guardian," spanned 11 months from the summer of 2025 to early 2026, with details publicly revealed in a report by the Cyber Security Agency of Singapore (CSA) on February 9, 2026. The attackers utilized a zero-day exploit to bypass perimeter firewalls and deployed rootkits to maintain persistence, though no personal data was compromised, nor were telecommunications services disrupted. This incident highlights the persistent and evolving threat of state-sponsored cyber espionage against critical infrastructure and Singapore's robust, multi-agency response capabilities.

• Total Defence Exercise SG Ready 2026 Concludes
  The national-level "Exercise SG Ready 2026," co-led by the Ministry of Defence (MINDEF) and key partners including the Infocomm Media Development Authority (IMDA) and Energy Market Authority (EMA), concluded on February 15, 2026. The exercise, which ran from February 1, 2026, focused on strengthening national readiness for degraded digital connectivity and prolonged power outages, set against a backdrop of geopolitical uncertainties and hybrid threats. It involved islandwide simulations and saw participation from over 1,000 organizations, schools, and community groups, testing their contingency plans and emergency protocols. The exercise underscores Singapore's emphasis on a whole-of-nation approach to resilience against modern disruptions.

• Singapore Armed Forces (SAF) Military and Live-Firing Exercises
  The SAF conducted military exercises in various areas including Seletar, Marsiling, and Tuas, and live-firing exercises in the Pasir Laba (SAFTI) Live-Firing Area from Monday, February 23, 2026, to Monday, March 2, 2026. During this period, sea vessels were advised to remain within the 75m Navigable Sea Lane in the Western Johor Straits. Additionally, the Republic of Singapore Air Force (RSAF) was scheduled to conduct land demolition activities in Tengah Air Base on Friday, February 27, 2026, with the public advised not to be alarmed by potential loud noises. These routine exercises are crucial for maintaining the operational readiness and proficiency of Singapore's defense forces.

• Increased Security Expenditure and Defense Policy Outlook
  Prime Minister Lawrence Wong announced during his Budget 2026 speech on February 12, 2026, that Singapore anticipates a rise in security-related expenditures in the coming years. This increase is a response to a "more dangerous world," characterized by escalating conflicts and sophisticated threats. While defense spending is currently maintained at approximately 3% of GDP, the government is prepared to allocate more if necessary. The focus includes strengthening cybersecurity posture, deepening capabilities, improving inter-agency coordination, and enhancing defenses against advanced attacks, including those involving unmanned systems. This signals a strategic commitment to sustained investment in national security.

• US Imposes New Tariffs on Singapore Goods
  US President Donald Trump announced a new 15% tariff on all goods entering the US from February 24, 2026, an increase from a previous 10% tariff imposed in April 2025. Deputy Prime Minister Gan Kim Yong stated on February 22, 2026, that the Singapore government would engage its US counterparts to seek clarity on the implementation of these tariffs. He also indicated that while current Budget 2026 measures are deemed sufficient for immediate impact, Singapore is prepared to introduce additional support measures for businesses and workers if needed, acknowledging the unpredictable and uncertain operating environment. This development poses potential economic challenges and requires careful diplomatic navigation.

• Maritime Security Discussed at Munich Security Conference
  Minister for Defence Chan Chun Sing participated in the Munich Security Conference 2026 Maritime Security Spotlight on February 13, 2026. During his remarks, he addressed the greatest threats to maritime security for Singapore and the broader region. Minister Chan emphasized that the increased naval presence of the US and China in Southeast Asia should not be viewed as a zero-sum game, advocating for shared interests in ensuring the safety and security of shipping lanes, particularly in the Straits of Malacca and the South China Sea. He highlighted the importance of establishing shared frameworks and fostering cooperation among all stakeholders to manage incidents effectively.

• Claims of Singaporeans Serving in Israel Defense Forces (IDF)
  Singapore's Ministry of Home Affairs (MHA) stated on February 20, 2026, that it has no verified information regarding claims that two Singapore passport holders served in the Israel Defense Forces (IDF) during the Gaza conflict. These claims originated from a Declassified UK report published on February 11, 2026, which cited IDF data obtained via a freedom of information request. Singaporean law generally prohibits citizens and permanent residents from serving in foreign armed forces without official authorization, with severe penalties for breaches. The MHA's statement underscores Singapore's strict policy on foreign military service and its non-involvement in external conflicts.

• Counter-Terrorism Exercise Heartbeat 2026
  A joint counter-terrorism and emergency preparedness exercise, "Exercise Heartbeat," was conducted at the National University of Singapore (NUS) University Town on February 13, 2026. The exercise involved over 120 participants, including officers from the Singapore Police Force's (SPF) Emergency Response Team (ERT) and Police Tactical Unit (PTU), as well as NUS stakeholders and students trained in emergency skills. Scenarios included simulated detonations of Improvised Explosive Devices (IEDs), armed terrorists, and a hostage situation, reinforcing the "Run, Hide, Tell" and "Press, Tie, Tell" (Improvised First Aid Skills) advisories. This exercise demonstrates Singapore's ongoing efforts to enhance community preparedness and inter-agency coordination against terror threats.

• F-35 Stealth Fighter Deliveries Expected in 2026
  Singapore is on track to receive its first F-35 Lightning II stealth fighters later in 2026. This marks a significant milestone in the Republic of Singapore Air Force's (RSAF) modernization efforts, following Singapore's decision in 2020 to procure the F-35. The acquisition is part of a comprehensive fleet modernization strategy aimed at replacing aging F-16C/D Fighting Falcons, which have been a cornerstone of the RSAF's fighter force for decades. The F-35s will bring transformative capabilities to Singapore's air defense.

• Singapore Maritime Week (SMW) 2026 Highlights Cybersecurity
  The Singapore Maritime Week (SMW) 2026, with its overarching theme "Actions Meet Ambition," is spotlighting key areas including geopolitical trends, digitalization, and decarbonization. A panel discussion on February 20, 2026, specifically addressed the evolving maritime cybersecurity landscape, examining how strategies, risk models, and governance frameworks are being reshaped by artificial intelligence (AI) and quantum computing. This focus reflects the growing recognition of cyber threats within the maritime domain, a critical sector for Singapore.

Geopolitical Impact and Regional Dynamics

The recent security developments in Singapore reflect a nation actively navigating a complex and increasingly volatile geopolitical landscape. The successful disruption of cyberattacks by a China-linked APT group, UNC3886, underscores the persistent challenge of cyber espionage and the delicate balance Singapore maintains in its relations with major powers. While Singapore and China have deepened cooperation in various sectors, including economic, digital, and people-to-people domains, and signed 27 agreements in December 2025, such cyber incidents highlight underlying tensions and the need for robust national cyber defenses. Singapore's ability to defend its critical infrastructure against sophisticated state-sponsored threats reinforces its strategic importance as a stable and secure hub in Southeast Asia.

The imposition of new 15% tariffs by the United States on Singaporean goods, effective February 24, 2026, introduces a layer of economic uncertainty and potential strain on bilateral trade relations. This development, following an earlier 10% tariff, could impact Singapore's export competitiveness and trade flows, necessitating proactive engagement with US counterparts and potential domestic support measures. Despite this, Singapore maintains a strong defense relationship with the US, with ongoing military cooperation and significant defense acquisitions from the US, such as the F-35 fighters and P-8A Poseidon aircraft. This demonstrates Singapore's strategy of maintaining strong security partnerships while navigating economic challenges with key allies.

Minister for Defence Chan Chun Sing's remarks at the Munich Security Conference 2026, advocating against a "zero-sum game" perspective regarding US and China naval presence in Southeast Asia, encapsulates Singapore's pragmatic and inclusive diplomatic approach. Singapore consistently emphasizes shared interests in maritime security and the importance of a rules-based international order to ensure regional stability. The ongoing "Exercise SG Ready 2026" and increased security spending are direct responses to a global environment characterized by escalating conflicts and hybrid threats, including a border dispute between ASEAN member states (Thailand and Cambodia) in 2025. These efforts contribute to regional stability by enhancing Singapore's own resilience and capacity to respond to crises, thereby reducing potential vulnerabilities that could be exploited by external actors.

Military and Defense Analysis

Singapore's military and defense posture continues to prioritize modernization, technological advancement, and comprehensive national resilience in response to evolving threats. The anticipated delivery of the first F-35 Lightning II stealth fighters later in 2026 marks a significant leap in the Republic of Singapore Air Force's (RSAF) capabilities, replacing its aging F-16C/D fleet. This acquisition, alongside the planned procurement of two additional Invincible-class submarines (bringing the fleet to six by 2034) and consideration of new maritime patrol aircraft like the Boeing P-8A Poseidon, demonstrates a sustained commitment to maintaining a technologically advanced and credible deterrent force. The US approval of a $2.3 billion weapons sale to Singapore in January 2026, including P-8A Poseidon reconnaissance aircraft, lightweight torpedoes, and air defense systems, further solidifies Singapore's defense modernization efforts and its strategic partnership with the United States.

Defense spending remains a critical component of Singapore's security strategy. Prime Minister Lawrence Wong's announcement during Budget 2026 on February 12, 2026, confirmed that defense spending would be maintained at approximately 3% of GDP, with a readiness to increase this if global circumstances demand. This consistent investment ensures the Singapore Armed Forces (SAF) can acquire cutting-edge platforms and develop advanced capabilities, particularly in areas like cybersecurity and countering unmanned systems, which are increasingly prevalent in modern warfare. The establishment of the Digital and Intelligence Service (DIS) within the SAF and the continuous enhancement of cybersecurity expertise across government agencies are testament to Singapore's recognition of the digital domain as a critical battleground.

Force posture and readiness are regularly tested through exercises such as "Exercise SG Ready 2026" and routine SAF military and live-firing activities. These exercises, including the counter-terrorism "Exercise Heartbeat 2026," are designed to ensure both military and civilian preparedness for a wide spectrum of threats, from cyberattacks and power outages to terror incidents. The emphasis on "Total Defence" and the integration of national servicemen (NSmen) into homeland security operations further bolster Singapore's comprehensive defense strategy, ensuring a robust and adaptable response to any national security contingency.

Outlook and Forecast

Short-term trends (1-3 months): Singapore will likely maintain a heightened state of vigilance against cyber threats, particularly from state-sponsored actors, following the recent disruption of the UNC3886 attacks. Continued investment in cyber defense capabilities and public-private partnerships will be a priority. The government will closely monitor the implementation and impact of the new US tariffs, engaging in diplomatic efforts to mitigate adverse economic effects and potentially rolling out additional support measures for affected businesses. Routine SAF military exercises and national resilience drills, such as those under the "Total Defence" framework, are expected to continue, reinforcing preparedness for hybrid threats and disruptions.

Critical flashpoints and risk areas: The primary flashpoints for Singapore in the immediate future include the persistent threat of sophisticated cyberattacks targeting critical national infrastructure, given the demonstrated capabilities of advanced persistent threat groups. The broader geopolitical rivalry between the US and China in Southeast Asia, particularly concerning maritime domains, remains a significant risk, with potential for miscalculation or escalation that could impact regional stability and Singapore's economic interests. Furthermore, the global environment of escalating conflicts, as highlighted by Prime Minister Wong, suggests a continued risk of regional instability or spillover effects that could necessitate Singapore's enhanced security posture. The ongoing situation in the Middle East and claims of Singaporeans in foreign armed forces also underscore the need for continued vigilance against radicalization and foreign interference.

Indicators to monitor: Key indicators to monitor include the frequency and sophistication of reported cyber incidents, particularly those targeting government or critical private sector entities. Developments in US trade policy and any further announcements regarding tariffs or trade agreements will be crucial for assessing economic impact. The nature and frequency of military exercises in the South China Sea and Strait of Malacca by major powers, as well as any diplomatic statements regarding regional security, will provide insights into geopolitical tensions. Domestically, public engagement and participation in national resilience programs, along with any new counter-terrorism advisories, will indicate the ongoing assessment of internal security threats.

Strategic recommendations: Singapore should continue its robust investment in advanced cybersecurity capabilities, including AI-driven defense mechanisms and quantum-safe technologies, while fostering deeper public-private sector collaboration for collective defense. Diplomatically, Singapore should actively pursue diversification of trade relations and strengthen regional economic blocs to build resilience against external economic pressures. Maintaining a strong, modern, and adaptable military, as evidenced by the F-35 and submarine acquisitions, is paramount. Simultaneously, Singapore should continue to champion multilateralism and a rules-based international order in regional security forums, advocating for open dialogue and shared frameworks to manage potential conflicts and ensure maritime security. Enhancing public awareness and preparedness for a wide spectrum of hybrid threats through ongoing "Total Defence" initiatives remains critical for overall national resilience.

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