This is not a zero day. The 0.0.0.0 bypass has been documented for a while now[1], including PNA bypass[2]. [1] https://github.com/nccgroup/singularity/wiki/Pr

This is not a zero day. The 0.0.0.0 bypass has been documented for a while now[1], including PNA bypass[2]. [1] https://github.com/nccgroup/singularity/wiki/Protection-Bypasses https://github.com/nccgroup/singularity/wiki/Protection-Bypa... [2] https://research.nccgroup.com/2023/04/27/state-of-dns-rebinding-in-2023/ https://research.nccgroup.com/2023/04/27/state-of-dns-rebind...