# Exchange Online security incidents · pwn.watch

> Security incidents tagged Exchange Online (vendor, product, platform or attack type).

Page: https://pwn.watch/t/exchange-online · generated 2026-10-22T22:41:49.181Z

## Status (as of 2026-10-22)
- Incidents: 1 (0 live, 0 live and not fully patched, 1 patched)
- Days without a Exchange Online security incident: 1142
- Newest incident started: 2023-05-15

## Feeds
- JSON (incidents + changes + posts): https://pwn.watch/t/exchange-online.json
- RSS (one item per incident, bumped on each update): https://pwn.watch/t/exchange-online/feed.xml
- This file: https://pwn.watch/t/exchange-online/llms.txt
- Whole site: https://pwn.watch/llms.txt · all tags: https://pwn.watch/tags.json

## Incidents (newest first by start date)
- [Storm-0558: stolen Microsoft signing key used to read government email](https://pwn.watch/i/microsoft-storm-0558-forged-tokens-exchange-online-2023) ([json](https://pwn.watch/i/microsoft-storm-0558-forged-tokens-exchange-online-2023.json)): critical, closed, patched, started 2023-05-15