On 6 December 2024, in an unprecedented move, Romania’s Constitutional Court annulled the results of the first round of its 24 November presidential election, citing evidence provided by intelligence agencies that the electoral process had been “compromised throughout its duration and across all stages”. This dramatic decision, unparalleled in Romania’s history since the 1989 revolution against the communist regime, underscores the evolving nature of hybrid warfare, one aspect of which includes algorithmic manipulation and cyber-enabled disinformation campaigns that target and destabilise democracies. The prospect of a NATO Ally on the Alliance’s south-eastern flank being undermined—not through military invasion but through algorithm-driven social media manipulation—serves as a stark reminder of national security vulnerabilities in the digital age. The implications extend far beyond Romania, highlighting the urgent need to integrate robust information security measures into NATO’s strategic framework.