Microsoft Teams: intrusion risk

Microsoft Teams

Attackers are using a combination of impersonation, domain infrastructure, and trusted software to scale Microsoft Teams intrusions across organizations.

Do this now

Check Microsoft's advisory for a Teams fix and restrict external Teams access and unknown guest accounts meanwhile.

First seen: 27 Oct 2026
Last update: 27 Oct 2026, 21:18 UTC
Source: news
On the menu as: Azure / M365

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Microsoft Teams: intrusion risk
Severity: unknown. Patch status: fix status unknown.
Affected: Microsoft Teams

Attackers are using a combination of impersonation, domain infrastructure, and trusted software to scale Microsoft Teams intrusions across organizations.

## Steps
1. This incident involves a provider (azure). Search config, CI and env templates (.env.example, wrangler.toml, vercel.json, terraform, workflow secrets) for credentials stored there. List each secret by name, where it is used, and how to rotate it. Never print secret values.
2. No source names a fix yet; check the vendor advisory. Until one ships: restrict network access to it.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://www.darkreading.com/cloud-security/email-bombing-external-teams-chats-repeatable-access-path https://thehackernews.com/2026/11/attackers-pose-as-it-support-on.html
https://pwned.coffee/i/microsoft-teams-intrusion-risk

Receipt

Exploitation: No known exploitation
Checked by hand “Microsoft Teams sits under Azure / M365 on the menu.” source
Score: No CVSS published yet: severity unknown.
Last checked: 4 Nov 2026, 08:18 UTC

Sources: KEV – CVE record – Vendor ✓

Sources

Totalone coffee