Social media communicates information quicker than any other medium, resulting in all kinds of content reaching massive audiences, including news, false statements, images, disinformation, and hate speech. Since its inception as an online communication medium that provides audiences with information, education, and entertainment, among others, social media has been a resource to humanity with far-reaching beneficial advantages for the entire globe. The study examined the implications of social media communications on national security, with a focus on EndSARS-related communications on social media. The survey research design was used in the study. The sample procedures used in this study were purposive and simple random sampling. A sample size of 385 was drawn from the population using the Cochran sample determining method. The study sample consisted of 385 participants (161 males and 224 females) from the five states in Southeast Nigeria. The research questions were answered using the mean and standard deviation, while the hypotheses were tested using a t-test and an analysis of variance (ANOVA). The findings revealed that the audience to a high extent participated in social media communications during the EndSARS saga in Nigeria; EndSARS communications on social media had a negative influence on Nigeria's security, posed threats to citizens’ lives and properties, degraded national unity and peaceful co-existence, triggered chaos in Nigeria, and created a dichotomy among Nigerian youths. Some of the factors that contributed to the level of influence of EndSARS social media communications on national security include the participation of reputable personalities and celebrities, the display of inciting images, exaggerations, and hate speech.