Sources – thehindu (https://www.thehindu.org/news/national/up-ats-arrests-four-members-of-terror-module-with-links-to-pakistan-handlers/article70820347.ece), indiatoday (https://www.indiatoday.in/cities/lucknow/story/uttar-pradesh-ats-busts-terror-module-arson-sabotage-pakistani-handlers-2891438-2026-04-04), ptcnews (https://www.ptcnews.tv/nation/up-ats-foils-terror-plot-lucknow-railway-sabotage-pakistan-isi-link-4423184).
What's a zero‑day vulnerability? It's a hidden weakness in any tech/software/app that even the creator isn't aware of – a completely unknown loophole.
For example, Pegasus was a zero‑day exploit that could target WhatsApp and iMessage, giving full control of a phone
without the user even knowing or interacting with any app.
Even though WhatsApp is marketed as secure, nothing is 100 % foolproof.