Assuming the unitarity of the Cabibbo-Cobayashi-Maskawa (CKM) matrix and comparing the elements V_ud and V_us extracted from beta and kaon decays, respectively, a discrepancy of ∼3 σ emerges, called the”Cabibbo Angle Anomaly” (CAA). This tension can be explained via modified W couplings to leptons, but in order to consistently assess the validity, a global fit including the electroweak (EW) precision constraints and the low energy tests of lepton flavour universality (LFU) is necessary. Performing such a fit for gauge-invariant dimension-6 operators, we find that even when assuming LFU, including the CKM elements V_us and V_ud into the electroweak fit has a relevant impact, shifting the best fit point significantly. Vector-like leptons (VLLs) are prime candidates for a corresponding UV completion since they can affect the W and Z couplings to leptons already at tree-level. We find a simple scenario consisting of a singlet, N, coupling to electrons and a triplet, Σ₁, coupling to muons which not only explains the CAA but also improves the electroweak fit in such a way that its best fit point is preferred by more than 4 σ with respect to the SM.