Taiwan Security Report — November 10, 2026

Security analysis based on open-source intelligence and web research. Period: November 03 — November 10, 2026.

Executive Summary

Taiwan faced heightened security challenges between November 3 and November 10, 2026, marked by significant Chinese military posturing and persistent cyber threats. The People's Liberation Army (PLA) conducted extensive air and naval incursions, including a record spike in aircraft sorties and a suspected large-scale exercise simulating Taiwan's isolation in the Western Pacific. Concurrently, Taiwan grappled with sophisticated cyberattacks, notably the exploitation of critical PHP vulnerabilities by a suspected China-nexus APT and a major data breach affecting a prominent online travel agency. Diplomatically, Beijing continued its pressure campaign, leading to Taiwan's closure of its representative office in Papua New Guinea, while Taipei sought to strengthen its "red-free" defense supply chains and enhance cyber resilience against AI-driven threats. These developments underscore a complex and escalating security environment, necessitating robust defense and cybersecurity measures.

Key Security Developments

• Military Activities and Exercises
  Taiwan's Ministry of National Defense (MND) reported a significant surge in Chinese military activity, tracking 49 PLA aircraft, six naval vessels, and six official ships between November 2 and November 3. Thirty-one of these aircraft crossed the Taiwan Strait median line, marking the most aircraft seen around Taiwan in a single day this year. This spike in activity coincided with a broader, unannounced military exercise by the People's Republic of China (PRC) that analysts suggest simulates surrounding and isolating Taiwan, involving over 100 PLA Navy (PLAN) and China Coast Guard (CCG) vessels in the Western Pacific.

• Defense Policy and Strategic Shifts
  The Taiwanese Ministry of Defense (MND) announced that all military drone procurements would undergo inspections to ensure they do not contain PRC-origin components, aiming to build a "red-free" supply chain. This policy change, announced on October 13, followed investigations into Taiwanese companies using PRC chips in military drones, with prosecutors detaining individuals from supplier Align Corp for violating the National Security Act.

• Diplomatic Relations
  Taiwan's Foreign Minister Lin Chia-lung criticized China for violating protocol by sending an informal email invitation for the APEC summit in Shenzhen, rather than a formal invitation via a special envoy, which Taiwan views as discriminatory. Additionally, Taiwan announced on November 8 it would close its representative office in Papua New Guinea following renewed demands from Port Moresby, attributed to rising Chinese pressure. Oman also issued a joint statement with China, reaffirming its support for Beijing's "one China principle".

• Security Incidents and Threats
  The Mainland Affairs Council (MAC) warned on November 3 that China is likely to adopt increasingly aggressive measures against Taiwan, including military intimidation, political interference, and cognitive warfare, as Chinese leader Xi Jinping consolidates power. Taiwan's National Security Bureau (NSB) announced on October 29 it is investigating cyberattacks suspected of being from the PRC against Democratic Progressive Party (DPP) Taipei mayoral candidate Puma Shen, highlighting the increasing threat to election security.

• Defense Acquisitions and Arms Deals
  Taiwan's focus on securing a "red-free" supply chain for military drones, as evidenced by the new inspection requirements, indicates a strategic shift towards indigenization and reducing reliance on potentially compromised components. This comes as Taiwan also has an aging fleet of artillery vehicles and is awaiting newer US systems for modernization.

• Cybersecurity
  The Ministry of Digital Affairs (MODA) established an advanced AI cybersecurity risk response task force to address the growing threat of AI-powered cyberattacks, recognizing that AI is making attacks faster and harder to stop. A suspected China-nexus APT actor exploited critical PHP vulnerabilities (CVE-2026-109618 and CVE-2026-109619) around October 25, rooting 25 servers across the U.S., Japan, Taiwan, and South Korea, including government-affiliated systems in Taiwan. On November 10, online travel agency EzTravel reported a cyberattack on its membership center, exposing information for over 690,000 customers, though payment data was not compromised.

• Maritime and Border Security
  Taiwanese Defence Minister Wellington Koo stated on November 10 that China is conducting "access-denial" military exercises in the Western Pacific, involving the Liaoning aircraft carrier group and other naval units. These deployments, including four naval task forces between Taiwan and Guam, are seen as an effort to coordinate principal surface combatants and potentially rehearse operations to prevent US and allied forces from intervening in a Taiwan conflict.

• Intelligence Activities
  A National Security Bureau (NSB) report submitted to the Legislative Yuan described two main forms of China's transnational repression against Taiwan: public political warnings and the use of incentives to recruit accomplices for surveillance, harassment, and physical attacks. The NSB also reported an alarming surge in cyberattacks on government agencies, with 186 million detected threats in July and 106 million in August, attributing the uptick to increased Chinese cyberactivity ahead of local elections.

Cyber Threat Landscape

Taiwan's cyber landscape during this period was characterized by persistent state-sponsored activity and significant data breaches, with a notable increase in AI-assisted attacks. A suspected China-nexus APT actor exploited a chained vulnerability set, CVE-2026-109618 and CVE-2026-109619 (PHP2Shell), along with a Linux kernel flaw, to compromise 25 servers across multiple countries, including Taiwan, around October 25, 2026. These attacks utilized AI-assisted tooling for target identification, exploitation, and credential extraction, affecting government-affiliated organizations in Taiwan. The Ministry of Digital Affairs (MODA) has acknowledged the growing challenge posed by AI in cyberattacks, noting that AI models are developing capabilities comparable to professional hackers, making defense increasingly difficult.

Further highlighting the AI threat, a single operator in Taiwan, using a team of 12 AI agents named BOSSAI, conducted a campaign against hundreds of organizations in 11 countries, including emergency services in Taiwan, leading to confirmed theft of medical and personal records. This demonstrates how individual actors can leverage AI to conduct sophisticated, large-scale operations previously requiring full teams. On November 10, Taiwan's online travel agency EzTravel reported a cyberattack on its membership center, exposing personal information of over 690,000 customers, though payment data remained secure. The National Security Bureau (NSB) also reported investigating cyberattacks suspected of being from the PRC against a Democratic Progressive Party (DPP) Taipei mayoral candidate, Puma Shen, underscoring the threat to election security.

In response to these evolving threats, Taiwan's Ministry of Digital Affairs established an advanced AI cybersecurity risk response task force to enhance information sharing and develop protective strategies for government agencies and critical infrastructure operators. The Administration for Cyber Security (ACS) urged government agencies, schools, and businesses to promptly update PHP following the discovery of the critical vulnerabilities, with nearly 800 government websites and systems affected. Background: Threat actors known to target Taiwan include WIZARD SPIDER (Russia-linked), APT27 (China-linked), Earth Lusca (China-linked), ToddyCat, DarkHotel (South Korea-linked), APT1 (China-linked), LOTUS PANDA (China-linked), and BRONZE HIGHLAND (China-linked).

Geopolitical Impact and Regional Dynamics

Taiwan's security developments during this period significantly amplify regional instability and underscore the persistent strategic competition in the Indo-Pacific. The extensive PLA military activities, particularly the suspected large-scale "access-denial" exercises in the Western Pacific involving over 100 naval and coast guard vessels, signal Beijing's intent to project power beyond the immediate Taiwan Strait and potentially rehearse operations to deter or prevent external intervention, especially from the US and its allies. This aggressive posture directly challenges the existing regional security architecture and raises concerns among neighboring countries like Japan, which has also reported Chinese naval and coast guard vessels passing through straits near its territory.

The Mainland Affairs Council's warning of China's increasingly aggressive measures, including military intimidation, political interference, and cognitive warfare, reflects a deepening of Beijing's "gray zone" tactics aimed at establishing de facto control over Taiwan without resorting to open conflict. This strategy seeks to erode Taiwan's confidence and international support, while diverting attention from China's domestic pressures. The diplomatic pressure exerted by China, leading to Taiwan's representative office closure in Papua New Guinea and Oman's reaffirmation of the "one China principle," demonstrates Beijing's ongoing efforts to isolate Taiwan on the international stage.

Relations with major powers remain central to Taiwan's security. While Taiwan maintains close contact with the US, especially following the US midterm elections, the potential for a Japan-Taiwan trade pact focusing on economic resilience in strategic sectors like semiconductors indicates a strengthening of ties with like-minded democracies. The ongoing cyber warfare, with suspected China-nexus APTs targeting Taiwanese government systems and political candidates, further complicates cross-strait relations and highlights the non-kinetic dimensions of this geopolitical struggle. The overall dynamic points to an increasingly militarized and contested Western Pacific, where Taiwan remains a critical flashpoint with global implications for trade, technology, and democratic values.

EU Relations and Implications

Taiwan's relations with the European Union during this period were not explicitly detailed in the provided news, but the broader geopolitical and cybersecurity developments have clear implications for EU interests. While the EU relationship outlook was assessed as "Stable" in August 2026, and cooperation projects exist across various sectors including Trade & Investment, Energy & Green Transition, Education & Skills, Digital & ICT, and Development Cooperation, the recent security incidents could impact these areas. The EU-Taiwan Semiconductor Cooperation, a key digital project, could be affected by the heightened military tensions and the focus on "red-free" supply chains, as disruptions to Taiwan's semiconductor industry would have global economic repercussions, including for Europe.

The escalating cyber threats, particularly the exploitation of critical vulnerabilities by suspected state-sponsored actors and the rise of AI-driven attacks, pose a direct risk to EU interests in Taiwan. EU-funded digital cooperation projects and investments in Taiwan's critical infrastructure could become targets or be indirectly impacted by these cyber campaigns. The EU's emphasis on cybersecurity resilience, as seen in its NIS2 directive, aligns with Taiwan's efforts to bolster its cyber defenses, suggesting potential areas for enhanced cooperation in threat intelligence sharing and joint defense strategies against sophisticated cyber adversaries.

Military and Defense Analysis

Taiwan's military and defense posture during this period was primarily characterized by its reactive measures to increased Chinese "gray zone" tactics and proactive steps to secure its defense supply chain. The Ministry of National Defense (MND) consistently tracked and responded to significant People's Liberation Army (PLA) air and naval incursions, deploying aircraft, naval ships, and coastal-based missile systems. A notable event was the detection of 49 Chinese military aircraft and 12 ships on November 3, with 31 aircraft crossing the Taiwan Strait median line, prompting Taiwan's defensive deployments.

In terms of modernization programs and capability developments, Taiwan is actively working to build a "red-free" supply chain for its military, particularly for drones. The MND's new requirement for all military drone procurements to undergo inspections to ensure no PRC-origin components are used is a significant strategic shift. This policy was enacted following investigations that found PRC chips in drones supplied to the Taiwanese military, leading to arrests and a tightening of procurement loopholes. While Taiwan has an aging fleet of artillery vehicles, it is awaiting newer US systems to replace them. The ongoing PLA "access-denial" exercises in the Western Pacific, involving the Liaoning aircraft carrier group, highlight the need for Taiwan to further develop its anti-access/area denial (A2/AD) capabilities and enhance its ability to coordinate with international partners to counter such large-scale naval operations.

Outlook and Forecast

Short-term trends (1-3 months): In the immediate future, Taiwan can expect continued and potentially intensified "gray zone" military pressure from China, particularly in the air and maritime domains around the Taiwan Strait and in the Western Pacific. The Mainland Affairs Council's warning of increasingly aggressive Chinese measures, including military intimidation and political interference, suggests a sustained campaign to assert Beijing's claims. Cyberattacks, especially those leveraging AI, are also likely to persist and grow in sophistication, targeting government systems, critical infrastructure, and election-related entities. Taiwan will likely continue its efforts to bolster cyber defenses, including the implementation of new AI cybersecurity task forces and urgent patching of vulnerabilities. Diplomatically, China will likely maintain its pressure to isolate Taiwan, potentially leading to further challenges to Taiwan's international participation and diplomatic ties.

Critical flashpoints and risk areas: The Taiwan Strait remains the primary flashpoint, with the constant threat of PLA incursions and potential escalation from "gray zone" tactics to more direct confrontations. The Western Pacific, particularly the sea lanes between Taiwan and Guam, is emerging as a critical risk area due to China's "access-denial" exercises, which could aim to interdict potential foreign intervention. Taiwan's critical infrastructure and government systems are high-risk targets for cyberattacks, especially with the increasing use of AI by threat actors. The upcoming local elections in Taiwan also present a flashpoint for increased cyber interference and cognitive warfare campaigns.

Indicators to monitor: Key indicators to monitor include the frequency, scale, and geographic scope of PLA air and naval activities around Taiwan and in the Western Pacific. Any changes in the types of PLA assets deployed, such as the commissioning of new advanced vessels like the Type 076 amphibious assault vessel Sichuan, would be significant. On the cyber front, monitoring reports of new state-sponsored APT activity, the exploitation of zero-day vulnerabilities, and the effectiveness of Taiwan's AI cybersecurity initiatives will be crucial. Diplomatic shifts, such as further attempts by China to isolate Taiwan or new agreements between Taiwan and other nations (e.g., the potential Japan-Taiwan trade pact), will also be important indicators of the evolving geopolitical landscape.

Strategic recommendations: Taiwan should continue to invest heavily in asymmetric defense capabilities, focusing on mobile, survivable, and precision-strike systems that can deter or counter a potential invasion or blockade. Strengthening its "red-free" supply chain initiatives is vital to enhance defense autonomy and resilience. On the cybersecurity front, a multi-layered defense strategy is essential, combining advanced threat intelligence, AI-driven defensive tools, and robust incident response capabilities. International cooperation in cybersecurity, intelligence sharing, and joint military exercises with like-minded partners (US, Japan, EU) should be prioritized to enhance deterrence and collective defense. Taiwan should also continue to advocate for its international participation and strengthen informal diplomatic ties to counter China's isolation efforts.

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