---
id: CVE-2026-62918
title: Microsoft Teams Spoofing Vulnerability
summary: >-
  Improper verification of cryptographic signature in Microsoft Teams allows an
  unauthorized attacker to perform spoofing over a network.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-347
vendor: Microsoft
product: Microsoft Teams
affected:
  - teams -
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-08-07T00:59:58.659715Z'
published: '2026-08-06'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T19:35:24.828Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-62918'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62918'
    label: Microsoft Teams Spoofing Vulnerability
tags:
  - cve.org
epss: 0.00495
epssPercentile: 0.39938
ingestedAt: '2026-09-08T18:07:34.903Z'
---

## Overview

Improper verification of cryptographic signature in Microsoft Teams allows an unauthorized attacker to perform spoofing over a network.

## Affected

- `teams -`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.