Microsoft: Some Teams users can’t join meetings after Edge update

Collection of BleepingComputer reports (22–23 Apr 2026) covering multiple active security incidents and vendor fixes: a recent Microsoft Edge update broke some Windows users’ ability to join Teams meetings; the UK NCSC warns China-aligned operators are leveraging large proxy networks of hijacked consumer devices to evade detection; a newly identified state-backed APT named GopherWhisper is abusing Outlook, Slack and Discord for C2; CISA mandated federal patching for a Microsoft Defender privilege-escalation zero-day dubbed “BlueHammer”; Apple issued out‑of‑band iOS/iPadOS fixes for a retained‑